Object ID: The purpose of this pass is to mask some objects in the scene and apply local effects like color grading, exposure, and so on.We’ll see later how to set up this pass in After Effects. It presents itself as a grayscale image, which stores the distance of the scene objects from the camera. Z– Depth is generally used to add some depth of field in post-processing.Colors are soft-this pass can be tweaked in After Effects to make colors more vivid or to emphasize the effect on the global illumination. Diffuse indirect shows the indirect diffuse rays connected with secondary or tertiary bounces. The pass stores the direct diffuse rays from the light sources in the scene. Diffuse direct considers the diffuse color of a surface due to direct lighting.Here’s the list of the most common render passes that we’ll take into account: For this purpose, I’ll be using Maya with Arnold, but choose the renderer of your liking. Almost all of the software allows for rendering specific layers. There are many ways to compose your final image by isolating specific light rays and elements. A close-up view of the previous rendered image. I decided to manage reflections, subsurface scattering effects, and refraction for the glasses.īuilding the final render with all the layers included, known as a Beauty pass, is our primary goal.Ĭompositors have to take all the passes and create the final image, as we see below: An example of a Beauty pass for our render. Here, we have an example of a rendered scene, which I created for this article. The same render pass is being imported as a layer in After Effects. Therefore, a render pass is an image containing specific aspects of the scene. That doesn’t necessarily mean the background from the foreground, but mainly the type of light rays affecting your scene.įor instance, a renderer knows what diffuse rays, as well as reflective rays are, but, if we don’t manage render passes, the render engine would include everything in the same layer. When you approach rendering, you have to find a way to isolate different elements in separated layers. Imagine a situation where you want to tweak some reflections, but the render has already been made and it’s practically impossible to isolate your reflections, unless you start your render from stratch.Ĭonsequently, the only way to make changes without affecting the other parts of the scene is to consider layers. On many occasions, you’ve probably heard of layer composition as a way to operate in post-production in order to make your renders even better. Just follow this in-depth, step-by-step process. Having complete control over your renders has never been so easy.
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