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I am working in the compositor with a lot of textures and distort nodes, which makes it very slow (easily 20-30 seconds to composite.) Every time I make a change, it re-composites. This is fine when j …

It is standard to create shadeless materials by using the emission shader, often with a Lightpath Is Camera Ray to prevent it from casting light on other objects. This creates a flat color regardless …

I've read that the Edge post processing effect from Blender Internal is Z based, and something similar can be done in the compositor. Can anyone suggest a setup for this, or have any ideas on how it w …

It seems that certain nodes, as part of their function, will clamp their output to between 0 and 1 regardless of the input number. I am not entirely sure of this. Is there a list of what nodes will do …

I am using a renderlayer with some vertex colors to render some masks. I have an object with a vertex color layer. The entire object is set to RGB values of .25 each (using set vertex colors command.) …

I want to take an image of X resolution, and make a new image of .5X resolution consisting of every other pixel from the original image. For example, if I had a 10 pixel image: 1 2 3 4 5 6 7 8 9 0 …

Is there a way to get ID masks or otherwise isolate an objects reflection in the compositor? For example, if I have a sphere above a reflective plane, I can set an ID mask on the sphere and use that t …

I have a white plane and a glass object on top of it, with 2 spotlights casting light through the glass object. This causes a lot of light to be cast onto the white plane. I want to turn the plane …

What is the difference between the Dilate/Erode nodes Step and Distance modes? I can tell they are doing different things, but I'm interested in the technical details and the documentation does not co …

What are the differences between the compositor's Shadow Pass and Diffuse Direct Passes in Cycles? I know one is that the Shadow Pass only responds to lamps and not mesh emitters. But even on renders …

In the Output tab of Render settings, you can set the output options for rendered animation. One of the options is to have new renders overwrite the previous ones or not. The File Output node in the c …

Say I have some footage that is 30 frames long, and I want to to apply a mask to it via mix nodes that is 3 frames long. I need it to loop 10 times to cover all my frames. How do I do this in the comp …

I have created a texture brush (not a cycles one) and then transformed it in various ways by going into the texture node editor and using nodes. My node tree consists of a cloud texture from the textu …

It is possible to have multiple objects share the same ID mask in the compositor. It does not seem possible to have objects possess multiple ID mask values though. Is there any way around this? I want …

I am trying to figure out the proper workflow setup to manually paint onto a render within Blender. I want to: Render an Image Run it through a compositor node setup Be able to manually paint on it …