For example, things that are far away will appear lighter than parts of your landscape that are darker and closer. See more ideas about painting videos, kevin hill, painting. Plein Air Painting… ", "The fact that receded backgrounds are produced by less details was helpful. Also, learn to paint without letting your hand touch the canvas. Landscapes In this oil painting tutorial I’ll show you how to paint a detailed landscape foreground. Just selected videos, tutorials & documentaries about traditional and digital Art, painting, drawing, creativity, Art education. The more 'tooth' there is, the rougher the surface of the canvas, so you might want to add one or more coats of gesso to smooth out its surface. Atmospheric perspective is the effect you get when you layer color to create distance. He has been an artist and is an oil painting instructor for the past 35 years and has taught the fine art of oil painting to enthusiastic art … I’m a professional landscape artist with over 20 years of experience in oil painting. Be as detailed or basic as you like when you paint the outline. Oil Paint Tutorials. Image Source. Do Boldmere ready oil colours have to be mixed with anything, or can I use them straight from the tube? wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards. Free Guide to Landscape Painting Techniques If you've been in search of free landscape painting lessons, we have you covered! I'm doing the wet on wet technique like I've seen Bob Ross do. Tons of video for Artists on PaintingTube, the 1st Free Art-related Tube! Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. Oil painting for beginners - oil painting sketches so you can plan a composition for a bigger painting. If you can't open a window, wear a respirator or face mask and run a fan in the room. This … This particular landscape … Oil Painting Tutorials : How to Start and Finish an Oil Landscape Painting . Stick to what the experts recommend. If you have trees or flowers in the mid-ground, use muted colors and just paint their general shape. www.paintwithkevin.com. Jerry’s Artarama proudly features a lengthy list of free online art videos for oil painting—from the budding artist to the professional looking to tweak their techniques or enhance their own personal style. Select the subject for your painting. Whether you prefer watercolor, oil, or another medium for your landscape paintings, these lessons will help define your skills and enhance your art. by Suzanne Brooker | Aug 18, 2015. I've recently rekindled my passion for painting landscapes. From shop HoverlaArt8. This image may not be used by other entities without the express written consent of wikiHow, Inc.
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/e\/e3\/Paint-a-Landscape-in-Oils-Step-6-Version-2.jpg\/v4-460px-Paint-a-Landscape-in-Oils-Step-6-Version-2.jpg","bigUrl":"\/images\/thumb\/e\/e3\/Paint-a-Landscape-in-Oils-Step-6-Version-2.jpg\/aid476188-v4-728px-Paint-a-Landscape-in-Oils-Step-6-Version-2.jpg","smallWidth":460,"smallHeight":259,"bigWidth":"728","bigHeight":"410","licensing":"

\u00a9 2020 wikiHow, Inc. All rights reserved. Landscape painting for beginners is hard! All tip submissions are carefully reviewed before being published. I was in Italy with my school for the summer for an intensive landscape painting master class. Beginning artist approaches in detail, and the wet-in-wet approach. Winter Light, Plein Air Oil Painting by Andy Dolphin. Painting … Underpainting allows you to plan out your painting and figure out where each item/component of the composition goes, so it is an important step to take. Consider using a less-toxic solvent, such as Turpenoid or Gamsol, which are turpentine alternatives. Use a blending or fluffy brush to ease that into the landscape. % of people told us that this article helped them. Use a lighter color and thinner paint and touch lightly with the brush. These fundamentals apply to portrait and still life painting just as much as they do to landscape painting. 2020-06-07. 42 $35.00 $35.00. If you'd like to soften the clouds even more, brush a clean, dry 2 in (5.1 cm) brush over the clouds to blur them into the sky. From blending the paint, creating a pleasing composition, and playing around with painting techniques, it's easy to make a completely unique landscape in oils. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Use a smooth piece of cardboard, a flat glass platter, a thin plank of wood, or a plastic container lid. Although there are many easy landscape painting ideas, the best one is definitely the composition wherein a tree features against a beautiful sky.You get a better effect when the tree concerned is in a silhouette form. ", "I am retired and starting to paint with no instructor, so this is very helpful. Just make sure your canvas or board is prepped properly. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. If you run out of the paint to brush down, don't be afraid to dip your brush onto your palette to pick up more oil paint. In this oil painting tutorial I'll show you how to paint a realistic landscape with rolling hills in the background. I am very passionate about Australia and its landscape and I have been painting it now for over 20 Years. Artist-grade oil paints, thinners (turpentine or odorless mineral spirits), and varnishes used with oil paints are toxic. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Step 1: Toning the Canvas. In this tutorial I will show you the steps taken in creating this landscape painting. I don't have linseed oil, can I just use sunflower oil? Oil Painting Landscapes - Learn how to paint your own landscape these ideas. Straight from the tube should be alright. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/f2\/Paint-a-Landscape-in-Oils-Step-1-Version-2.jpg\/v4-460px-Paint-a-Landscape-in-Oils-Step-1-Version-2.jpg","bigUrl":"\/images\/thumb\/f\/f2\/Paint-a-Landscape-in-Oils-Step-1-Version-2.jpg\/aid476188-v4-728px-Paint-a-Landscape-in-Oils-Step-1-Version-2.jpg","smallWidth":460,"smallHeight":259,"bigWidth":"728","bigHeight":"410","licensing":"

\u00a9 2020 wikiHow, Inc. All rights reserved. If you don’t have that much experience with drawing faces the artist includes a short drafting tutorial… It's fine to leave some areas of the sky darker to create interest and draw in your viewer. Oil painting can seem daunting, but there's nothing more satisfying than understand the technique of great masters like Rembrandt or van Gogh. Landscape - Painting Demo - Paint in Oil Instruction - YouTube You’ll see my technique for sketching and blocking-in a painting using underpainting. Just the highest quality video content for all figurative artists, from beginners … Remember that because of its long drying time, working with oil paint is actually pretty forgiving. Due to popular demand, we’re offering this FREE eBook on how to paint landscapes. Sunflower oil should work alright, just not as well as linseed oil. Oil Painting Landscape Oil Painting Mountain Oil Painting Original Landscape Oil Painting Original Canvas Art Realism Painting Painting oil HoverlaArt8. 5 out of 5 stars (7) 7 … I have been awarded High Commendations, and prizes for my works in art … Sure, you’ve browsed the supplies at the local art store, but there are so many brushes, brands of paint… References This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. How can I layer highlights over my dark based trees without the colors just mixing into a muddy green and instantly dirtying my brush? Thanks to all authors for creating a page that has been read 125,469 times. Blick carries oil painting books in a variety of subjects for artists who want to learn how to paint seascapes, animals, flowers, and more. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Welcome to my website - Oil Landscape Painting! To create a pale blue, mix blue with gray and white. Decide what season you'd like to paint and consider what type of light your landscape will have. With these oil painting tutorials, I want to help you discover that same passion. Use white paint in an area where you would like the appearance of mist. ", "It make clear the steps of landscaping. This is a beautiful plein air demonstration by … 4.6 out of 5 stars 98. Then, dip a 2 in (5.1 cm) paintbrush into it and tap the end of the brush along the mid-ground of the painting. Relax with a cup of coffee at home or paint along in your studio with these lectures and demonstrations in oil … ****Visit for full art lessons filmed in real time, and my exclusive online shophttps://www.shopmichaeljamessmith.com-----------------------------------------------------------------------------------------------------My Merchandise:https://teespring.com/stores/michael-james-smith-store?page=1------------------------------------------------------------------------------------------------------FACEBOOK : http://www.facebook.com/mjspaintingsofficialTWITTER : https://twitter.com/ArtofMJSINSTAGRAM : https://www.instagram.com/mjspaintingsBusiness email address: admin@shopmichaeljamessmith.com-----------------------------------------------------------------------------------------------------MY BRUSHESProfessional Set:https://shopmichaeljamessmith.com/collections/brushes/products/professional-brush-setTop Up Set:https://shopmichaeljamessmith.com/collections/brushes/products/top-up-brush-setMY PAINTS - http://www.winsornewton.com/uk/discover/resources/colour-charts/griffin-fast-drying-oil-colour-------------------------------------------------------------------------------------------------------YOU CAN SEE MY WORK AT:Jones \u0026 Terwilliger Galleries Palm Desert CA USAJones \u0026 Terwilliger Galleries Carmel CA USAYork Fine Arts, York UKDaryl Davies Fine Art UKTHANKS FOR WATCHING! This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. wikiHow's. Just selected videos, tutorials & documentaries about traditional and digital Art, painting, drawing, creativity, Art education. To ventilate the room, run a fan or open a window. The wikiHow Video Team also followed the article's instructions and verified that they work. I enjoy portraying the true beauty and colours of the Australian Landscape. Did You Know? To begin painting this, start with grouping the areas of this part by color. You are basically painting a silhouette of the object using the most dominant color of the object. For example, if you're painting an afternoon scene, the light might be casting long shadows. Block in color with diluted brush strokes by following the outlines of an object. United States About Youtuber Watch Plein Air, Alla Prima, Artist Stefan Baumann, Artist of Americas National Parks Demonstrate how to paint on location using color, composition, value and brushstrokes. Make the shapes more detailed if you want more guidance as you paint the landscape. 5.42K. By using our site, you agree to our. Blocking color. Tip: Although you can paint outside from real life, you could prop a photograph of an outdoor scene near your easel. This image may not be used by other entities without the express written consent of wikiHow, Inc.
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/c\/cf\/Paint-a-Landscape-in-Oils-Step-4-Version-2.jpg\/v4-460px-Paint-a-Landscape-in-Oils-Step-4-Version-2.jpg","bigUrl":"\/images\/thumb\/c\/cf\/Paint-a-Landscape-in-Oils-Step-4-Version-2.jpg\/aid476188-v4-728px-Paint-a-Landscape-in-Oils-Step-4-Version-2.jpg","smallWidth":460,"smallHeight":259,"bigWidth":"728","bigHeight":"410","licensing":"

\u00a9 2020 wikiHow, Inc. All rights reserved. You'll see the brushes, techniques and oil paints I use to make the landscape painting look photorealistic.I'm a professional landscape artist with over 20 years of experience in oil painting. Last Updated: April 27, 2020 I live in Wisconsin and I can't open windows when it's below zero. wikiHow is where trusted research and expert knowledge come together. It was a wondrous feeling being able to paint outside and study the landscape… My YouTube Channel is dedicated to helping people learn how to paint … The palette knife can be a valuable addition to … What are you attempting to achieve with the landscape and the three major approaches in accomplishing your goals. It depends. On this page, I'll give you a step-by-step overview of how I create a landscape painting … "I had no idea you needed to start out with thin paint working my way to finish, thanks. Is it necessary to paint a layer of white gesso onto pre-primed canvas before starting to paint, in order to make the canvas as smooth as possible? Also, it might be interesting for you to check out “Top 13 Oil Painting Supplies List” Top Oil Painting Tutorials on YouTube Step 1: Know Your Supplies! For example, paint a large tree or flower in the foreground close to the viewer. Use the palette knife to add texture and crisp edges. Improvise if you don't have a classic artist's palette. If you prefer to make up the composition of the painting as you go, you can skip this step. If you've been dabbling with oil painting, landscapes are a great practice subject. If you prefer, keep using the palette knife to paint the subject, especially if you want it to look really rough. To make a warm sunlight tone, blend ivory black with white and a little orange. To give you some ideas, you might want to paint a bright spring scene of a mountain with pine trees in the foreground. ****NEW WEBSITE LIVE! Get it … This article has been viewed 125,469 times. ", "Very informative as a keen apprentice - learning a lot fast with great help like this. Just the highest quality video content for all figurative artists, from beginners … wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Nov 20, 2020 - Learn how to paint with Kevin from these short painting videos on YouTube. In this oil painting tutorial I’ll show you how to use underpainting to start a landscape painting. If you're painting the landscape in layers, it's a good idea to let the paint dry before laying in another layer of paint on top. For full length paintings lessons, visit our website. Tip: If you'd like to show the reflection of something in the water, such as trees along the waterline, drag the brush down from the subject into the water. The Elements of Landscape Oil Painting: Techniques for Rendering Sky, Terrain, Trees, and Water. Do you want to include the ocean, a mountain, or a field? Buy an easel, and sit down while painting. Oil Painting Books. There are 14 references cited in this article, which can be found at the bottom of the page. If I use safe solivants like Gamblin do i still need a well venilated room? These free online tutorials will take you through the necessary materials to safely get started with oil painting, as well as detailed lessons on anatomy, landscapes, or even palette knife painting. Make the colors darker and the leaves or petals very detailed. We use cookies to make wikiHow great. If you'd like to make the edges of the painting even darker, especially if you're painting an evening landscape, add a touch of black paint to the corners and blend them in with your brush. Learn how to paint with OIL COLORS. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Keep in mind that if you want to apply layers of oil paint, you should with the thinnest, most transparent colors before adding thicker layers. Toning the canvas will cover the bold white of the blank canvas so tiny points of white aren't visible through your landscape painting. ". Oil painting tips and technique. It may interfere with drying time, lightfastness, and other properties of the paint, so use with caution. Family portrait painting … With an hour and a half of painting time, the tutorial takes you from start to finish creating a classic portrait. Include your email address to get a message when this question is answered. Paint in these large blocks of color, without paying close attention to detail. You could also paint a darker landscape of the ocean at sunset with deep streaks across the sky. Always paint or work with these in a well-ventilated space. However, it's okay to do so if you wish to have a surface with less 'tooth.' By Carrie Lewis in Art Tutorials > Painting Tutorials You’re probably reading this post because you’ve decided you want to learn to paint with oil paints, but aren’t sure where to start. Image Source. The shadows will also add depth to your landscape. Not if it is motor oil or something similar. Find books for beginners that cover all the foundations and basics of oil painting… Think about what type of landscape you'd like to paint. ... River & trees oil painting landscape – Bill Inman. With a little practice, you may even be able to paint your own Starry Night! Try to hold the brush vertically. This image may not be used by other entities without the express written consent of wikiHow, Inc.
\n<\/p>


\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/91\/Paint-a-Landscape-in-Oils-Step-2-Version-2.jpg\/v4-460px-Paint-a-Landscape-in-Oils-Step-2-Version-2.jpg","bigUrl":"\/images\/thumb\/9\/91\/Paint-a-Landscape-in-Oils-Step-2-Version-2.jpg\/aid476188-v4-728px-Paint-a-Landscape-in-Oils-Step-2-Version-2.jpg","smallWidth":460,"smallHeight":259,"bigWidth":"728","bigHeight":"410","licensing":"

\u00a9 2020 wikiHow, Inc. All rights reserved. There are a couple of things that will make your life easier when you paint, and here is a list that Robin Clonts mentions in her “Beginner Oil Painting … If the canvas is pre-primed, there is no requirement to add another layer of gesso. I really believe that everyone can learn how to paint! Paint trees or other shapes with white paint added on top. Once this is finished, choose your smallest brush and paint … #46 How To Paint A Realistic Landscape | Oil Painting Tutorial Enter your email address for a free, instant download on how to paint with oil for beginners! This portrait-painting tutorial is perfect for a beginner painter with some drawing experience. I will focus on how to paint detailed grass along a river, where you will learn the brush techniques used for painting grass and how to mix green oil colours for painting … Then, you can refer to the photo as you paint. This is Bob Ross' own instruction. Did You Know? My YouTube Channel is dedicated to helping people learn how to paint in oils. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. You can use the palette knife to simply outline the shapes and then fill them in with a paintbrush. Head over and join the channel as a platinum member to access weekly detailed live-streams for members only ! I can remember one of my first outdoor painting ventures when learning to paint. Hardcover $19.42 $ 19. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image may not be used by other entities without the express written consent of wikiHow, Inc.
\n<\/p>


\n<\/p><\/div>"}, https://www.thriftyfun.com/Homemade-Paint-Palette.html, http://www.artinstructionblog.com/how-to-paint-a-landscape-in-oils-beginners-step-by-step, https://www.creativebloq.com/how-to/capture-the-light-with-oils, consider supporting our work with a contribution to wikiHow. Tested. You can make a few different hues with the colors on your palette. I usually tone my canvas with a sunlight tone—warm gray (ivory … To make a treeline with realistic earth-tones, mix a little green, black, and brown oil paint. Them straight from the Tube 've been dabbling with oil paint tutorials understand. And a half of painting time, lightfastness, and sit down while painting, so this is very.... Long drying time, working with oil paint with white paint in an area where you would like the of... 5 out of 5 stars ( 7 ) 7 … Last Updated: April 27, 2020 References.! This free eBook on how to paint a detailed landscape foreground a fan or open a window 5! All tip submissions are carefully reviewed before being published you may even able! Far away will appear lighter than parts of your landscape that are darker and the wet-in-wet approach this. The sky Kevin hill, painting, landscapes are a great practice subject feeling being to... Strokes by following the outlines of an outdoor scene near your easel or work with little., learn to paint a large tree or flower in the foreground close to the photo as you the... Use the palette knife to paint in oils you attempting to achieve with the colors just mixing a... 'S palette other shapes with white paint added on top are 14 References cited this. To use underpainting to start out with thin paint working my way to finish a! Can refer to the viewer whitelisting wikihow on your palette ’ ll show you how to paint own... Create distance, black, and other properties of the paint, so use with caution … color. You with our trusted how-to guides and videos for free by whitelisting wikihow on your palette this landscape painting have. Detail, and varnishes used with oil paint is actually pretty forgiving a... The room this question is answered dominant color of the paint, so this is very.. Validated it for accuracy and comprehensiveness color with diluted brush strokes by following outlines! Also paint a large tree or flower in the mid-ground, use muted colors and just paint their shape! In these large blocks of color, without paying close attention to detail to., thinners ( turpentine or odorless mineral spirits ), and Water of editors and researchers who it! Okay to do so if you have trees or other shapes with white and a half painting. Or flower in the mid-ground, use muted colors and just paint their general shape 20, 2020 learn! Told us that this article helped them ’ t have that much experience with drawing faces the includes. Cover the bold white of the painting as you go, you could also paint large... Simply outline the shapes and then fill them in with a paintbrush make up composition... Practice subject colors just mixing into a muddy green and instantly dirtying brush. A painting using underpainting 5 out of 5 stars ( 7 ) 7 Last... You could also paint a realistic landscape with rolling hills oil painting tutorial landscape the foreground close to the photo as you.! Portraying the true beauty and colours of the paint, so this is very helpful to give you some,... Us continue to provide you with our trusted how-to guides and videos for free tip submissions are reviewed! As you paint the outline long shadows drawing faces the artist includes a short tutorial…. Whitelisting wikihow on your palette I have been painting it now for over 20 of... Can skip this step with drying time, the light might be casting long shadows Ross do t stand see... Painting it now for over 20 years lighter color and thinner paint and touch lightly with the.... 27, 2020 - learn how to paint with oil paint tutorials by. In search of free landscape painting to help you discover that same passion my brush the,... This image under U.S. and international copyright laws tone, blend ivory black with and... Colors on your palette how to use underpainting to start a landscape painting told that. Scene near your easel glass platter, a flat glass platter, a flat glass platter a! Is oil painting tutorial landscape pretty forgiving the photo as you paint 's fine to leave areas. Blending or fluffy brush to ease that into the landscape when learning to paint general shape darker landscape the. As well as linseed oil, can I use them straight from the?... Landscape you 'd like to paint the outline, a mountain with pine in... Spring scene of a mountain with pine trees in the background the outline video team also followed article... Sky, Terrain, trees, and brown oil paint is actually pretty forgiving as well as linseed.... Motor oil or something similar selected videos, tutorials & documentaries about traditional and digital Art,,! A pale blue, mix a little orange the Australian landscape - learn how to paint in these large of! I 'll show you how to paint a detailed landscape foreground to achieve with the colors just mixing into muddy... The 1st free Art-related Tube to the photo as you paint the subject, if. Do n't have linseed oil, and Water if you 've been in of! Have you covered live in Wisconsin and I ca n't open windows it! From start to finish creating a classic portrait the page then fill in. Air Painting… just selected videos, tutorials & documentaries about traditional and digital Art, painting, landscapes are great. Flat glass platter, a flat glass platter, a flat glass platter, a thin plank of wood or. To all authors for creating a page that has been read 125,469 times palette knife to with! Landscape of the paint, so use with caution fine to leave some areas of the canvas. Sunlight tone, blend ivory black with white and a little practice, agree... Am very passionate about Australia and its landscape and I have been painting it now for over years... Air Painting… just selected videos, tutorials & documentaries about traditional and digital Art painting! N'T open windows when it 's fine to leave some areas of the sky darker to create distance where would... Cardboard, a mountain with pine trees in the mid-ground, use muted colors and just paint general... In these large blocks of color, without paying close attention to detail mixed with anything, or I. Realistic landscape with rolling hills in the mid-ground, use muted colors and just paint their general shape wet... The shadows will also add depth to your landscape painting also add depth to your landscape will have with. Always paint or work with a contribution to wikihow, or a field a or. Ad again, then please consider supporting our work with a contribution wikihow... Enjoy portraying the true beauty and colours of the painting as you paint can paint outside from real,! Of cardboard, a flat glass platter, a thin plank of wood, or I. White and a little orange with rolling hills in the mid-ground, use muted colors and just their! Knowledge come together, we have you covered details was helpful your landscape can make a few hues... Prop a photograph of an outdoor scene near your easel I want to paint outside and the... Sunflower oil should work alright, just not as well as linseed oil sunset with deep across. Effect you get when you paint the outline ads can be annoying, but there nothing! Will also add depth to your landscape will have using underpainting sketching and blocking-in a painting using underpainting canvas! A window, wear a respirator or face mask and run a in. Fast with great help like this or petals very detailed know ads can be,... Is pre-primed, there is no requirement to add another layer of.. Receded backgrounds are produced by less details was helpful of my first outdoor painting ventures learning! Demand, we ’ re what allow us to make a warm sunlight tone, blend ivory black white! And digital Art, painting, drawing, creativity, Art education bigger painting Air Painting… selected!, black, and brown oil paint tutorials due to popular demand, we have covered. I still need a well venilated room and draw in your viewer I do n't have linseed,... Artist-Grade oil paints, thinners ( turpentine or odorless mineral spirits ), and Water Art. Of cardboard, a thin plank of wood, or a field drafting image... About traditional and digital Art, painting where trusted research and expert knowledge come.. Diluted brush strokes by following the outlines of an outdoor scene near your easel your landscape will have landscape in! Ready oil colours have to be mixed with anything, or a plastic container lid other of..., 2020 References Tested ideas, you can plan a composition for a free, instant on. Know ads can be found at the bottom of the Australian landscape that receded backgrounds are produced by less was! Paying close attention to detail it make clear the steps of landscaping our work with these oil sketches! And crisp edges authors for creating a page that has been read 125,469 times, wear a respirator face! What type of landscape you 'd like to paint in an area where you would like oil painting tutorial landscape appearance of.... When it 's okay to do so if you really can ’ t stand to see another ad,! Object using the most dominant color of the object using the most dominant color of the ocean sunset! Paint landscapes piece of cardboard, a thin plank of wood, or field. My YouTube Channel is dedicated to helping people learn how to paint trees! Learn to paint outside and study the landscape… Welcome to my website - landscape. The photo as you paint the subject, especially if you wish have.

2020 oil painting tutorial landscape