- Rendering for Compositing?

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  03 March 2002
- Rendering for Compositing?

I'm going to render an animation out for composition. I was wondering what's the best way to do it.

Problem I'm having is when I render in parts, only some things will have alpha channels. For example, say I'd want to render out a sky, sun, and ground out seperate. How do I do it so I have an alpha channel for all? I only get an alpha channel for the ground.
 
  03 March 2002
How are your sky and sun ?
Are they made with Skytracer ? If so, might be the reason why you don't have any alpha.
The ground is an object (right ? ) and it have alpha.

Perhaps post an image.
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  03 March 2002
No, I make skies with the LW_TextureEnviroment plugin. The sun is a couple of volumetric point lights. I see what you mean though.

Anyone have an idea how I'd make the alpha for the sky and/or sun? I'm using After Effects 5.
 
  03 March 2002
Well you could render Sky and suns in greyscale (Dark sky & white clouds/sun) and use the "luma matte" mode to compose...

Just an idea.
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  01 January 2006
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