issue74:blender
Différences
Ci-dessous, les différences entre deux révisions de la page.
Prochaine révision | Révision précédente | ||
issue74:blender [2013/08/12 19:10] – créée auntiee | issue74:blender [2013/11/25 13:52] (Version actuelle) – auntiee | ||
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- | Last month we used Cycles Render to create the image shown below left. | + | **Last month we used Cycles Render to create the image shown below left. |
Let’s create a similar image (below right) with the Blender engine. | Let’s create a similar image (below right) with the Blender engine. | ||
- | The first thing that we notice (at least me) is shadows. The shadows that our point lamp casts, with blender render, are almost black. This phenomenon is happening because in Blender renderer, the light is been emitted by the lamp only. This isn't realistic, as in the real world every object emits or reflects light. | + | The first thing that we notice (at least me) is shadows. The shadows that our point lamp casts, with blender render, are almost black. This phenomenon is happening because in Blender renderer, the light is been emitted by the lamp only. This isn't realistic, as in the real world every object emits or reflects light.** |
- | On the other hand, Cycles | + | Le mois dernier, nous avons utilisé le moteur |
- | One other thing that is very crucial, and a main difference between | + | Nous allons créer une image similaire (ci-dessous à droite) avec le moteur |
- | Navigate to File > User Preferences | + | La première chose que nous remarquons (au moins moi), ce sont les ombres. Les ombres que notre lampe point projette, avec Blender Render, sont presque noires. Ce phénomène se produit parce que dans le moteur de rendu Blender, la lumière n'a été émise que par la lampe. Ce n'est pas réaliste, puisque, dans le monde réel, chaque objet émet ou réfléchit la lumière. |
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+ | **On the other hand, Cycles renderer calculates the light that every object has from the surroundings. You can observe the cone and see how the shadow from the cube smoothly fades (contrary to the cone from the Blender renderer), and we have a mirroring ground and a shiny metal cube in our scene. | ||
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+ | One other thing that is very crucial, and a main difference between Blender and Cycles, is more technical.** | ||
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+ | En revanche, le moteur de rendu Cycles calcule la lumière que chaque objet accummule des environs. Vous pouvez observer le cône et voir comment l' | ||
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+ | Une autre chose qui est très importante, et une différence principale entre Blender et Cycles, est plus technique. | ||
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+ | **Navigate to File > User Preferences | ||
At the lower left corner of the System Tab you can check if your computer has Nvidia CUDA support under Compute Device | At the lower left corner of the System Tab you can check if your computer has Nvidia CUDA support under Compute Device | ||
- | My GPU has CUDA support so I can enable it. You can also check it at the official CUDA support url: https:// | + | My GPU has CUDA support so I can enable it. You can also check it at the official CUDA support url: https:// |
- | If you are lucky and have an Nvidia CUDA card, you have to enable it under the Compute Device Tab that I mentioned before AND under the Properties Panel, Render Tab -> Device | + | Allez à Fichier |
+ | Dans le coin inférieur gauche de l' | ||
- | Cycles can use your GPU CUDA cores to render, and is much faster than the CPU. Check out CUDA at wikipedia | + | Mon GPU prend en charge |
- | If you don' | + | **If you are lucky and have an Nvidia |
- | But enough with the technical stuff. | ||
- | Let’s see another great thing about Cycles. Open the .blend file that we started last month, or just create a new one. Don't forget to check that the Cycles Render at the top is selected | + | Cycles can use your GPU CUDA cores to render, and is much faster than the CPU. Check out CUDA at wikipedia : http:// |
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+ | Si vous êtes chanceux et avez une carte Nvidia CUDA, vous devez l' | ||
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+ | Le moteur Cycles peut utiliser vos cœurs CUDA GPU pour son travail de rendu et il est beaucoup plus rapide que le CPU. Découvrez CUDA à wikipedia: http:// | ||
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+ | **If you don't have a CUDA GPU, you can use Open Shading Language, but it's a little bit buggy and I couldn' | ||
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+ | But enough with the technical stuff.** | ||
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+ | Si vous ne disposez pas d'un GPU CUDA, vous pouvez utiliser Open Shading Language, mais il a quelques bogues et je ne peux pas recommander cette méthode de rendu pour l' | ||
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+ | Mais assez pour les trucs techniques. | ||
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+ | **Let’s see another great thing about Cycles. Open the .blend file that we started last month, or just create a new one. Don't forget to check that the Cycles Render at the top is selected | ||
Also change one of your 3d view windows to show the rendered result. | Also change one of your 3d view windows to show the rendered result. | ||
- | Select the sphere, navigate to the Properties Panel and change the Surface shader from the default Diffuse BSDF to Emission. | + | Select the sphere, navigate to the Properties Panel and change the Surface shader from the default Diffuse BSDF to Emission.** |
- | You can check in the Preview window the cool effect that we create. You can adjust the Color and the Strength of the light that your object emits. Also for every shader you can adjust a lot of other things (as textures, for example) by pressing the little dot right next to color and strength values. | + | Voyons une autre chose géniale à propos de Cycles. Ouvrez le fichier |
+ | Modifiez également l'une de vos fenêtres de vue 3D pour montrer le résultat du rendu. | ||
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+ | Sélectionnez la sphère, accédez au panneau Propriétés et modifiez le shader de Surface de BSDF Diffuse par défaut à Émission. | ||
- | Select our metallic-looking cube, press the little dot next to color, and change its texture to Brick Texture. Check the result in your 3d view window and select different textures until you find something that you like. | + | **You can check in the Preview window the cool effect that we create. You can adjust the Color and the Strength of the light that your object emits. Also for every shader you can adjust a lot of other things (as textures, for example) by pressing |
+ | Select our metallic-looking cube, press the little dot next to color, and change its texture to Brick Texture. Check the result in your 3d view window and select different textures until you find something that you like.** | ||
+ | Vous pouvez vérifier dans la fenêtre de prévisualisation l' | ||
- | TIP: The little dots are in every shader, not only emission, and I personally find them very useful to quickly create interesting stuff. | + | Choisissez notre cube d' |
- | Another interesting | + | **TIP: The little dots are in every shader, |
- | Check the result on your preview window and adjust the settings as you like. | + | Another interesting shader is the Mix Shader. As you can easily understand from its name, this is a shader that you can use to mix other shaders. Two other shaders to be more precise. So, let’s select our cone and change the Diffuse BSDF shader to Mix Shader. Add a Glass shader and a Diffuse shader or a Glossy Shader and an Anisotropic Shader to our cone. Change the value of the Fac parameter to adjust the percentage of the second shader (0.000 means 0% while 1.000 means 100%)** |
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+ | ASTUCE : Les petits points sont présents dans tous les shaders, pas seulement Émission, et je les trouve personnellement très utiles pour créer rapidement des choses intéressantes. | ||
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+ | Un autre shader intéressant est le Shader Mix. Comme son nom l' | ||
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+ | **Check the result on your preview window and adjust the settings as you like. | ||
Another thing that I want to mention in this tiny little introduction on the Cycles Renderer, is the use of planes instead of lamps. | Another thing that I want to mention in this tiny little introduction on the Cycles Renderer, is the use of planes instead of lamps. | ||
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Also visit www.blendernews.org to enter and share with thousands of professional artists! | Also visit www.blendernews.org to enter and share with thousands of professional artists! | ||
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+ | http:// | ||
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+ | Vérifiez le résultat dans votre fenêtre d' | ||
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+ | Une autre chose que je tiens à mentionner dans cette toute petite introduction au moteur de rendu Cycles, est l' | ||
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+ | La plupart des gens qui travaillent dans Blender et Cycles utilisent des plans pour éclairer leurs scènes. On dirait un éclairage qui est davantage celui du « monde réel » et je n'ai aucune raison de les contredire. | ||
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+ | Ci-dessous, ce que j' | ||
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+ | Pour ce mois-ci, suivez ce lien http:// | ||
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+ | Visitez aussi www.blendernews.org pour vous inscrire et partager avec des milliers d' | ||
http:// | http:// |
issue74/blender.1376327401.txt.gz · Dernière modification : 2013/08/12 19:10 de auntiee