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Lighting, materials, textures and various cheats are the subject of this in-depth Blender Cycles intro from BlenderDiplom.com
submitted: 5 years and 2981 days ago
Let’s assume you have a scene ready, and that you want to render it with the Radiosity Rendering. The first thing to grasp when doing Radiosity is that no Lamps are necessary, but some meshes with an Emit material property greater than zero are required, since these will be the light sources. Emit is found on the Shaders panel in the bottom right (Material sub-context). Typically, a value of 0.5 or less gives a soft radiance.
submitted: 5 years and 3724 days ago
Renderlayers are used to separate your composite image into layers. Use RenderLayers for a specific reason - such as creating depth of field, relighting isolated elements within the image via a normal pass, adding a colorcast to specific portions of the image, etc. The keyword here is isolation. Renderlayers allow you to dissect, effect and or correct individual elements or groups within your composition before outputting your final render. This saves you from endlessly re-rendering your scene just to find out whether a correction is going to work or not.
submitted: 5 years and 3722 days ago