render uv pass of an objects reflection

Hello,

I know how to render a uvw pass from the multi pass window, but what if said object is reflecting in a ground. Is there a way to get its reflections uv map in a multipass render?

Thanks!

A while ago I did a test in which I applied gradients, in UV colours, as a shader to an object. Make other objects in the scene 100% reflective and you get a reflected UV map. As I remember you need to save as exr for it to have the precision it needs.
Its hacky but it works.

That sounds promising. Do you recall what hues you used exactly and in what order?

I may have the file at work, I'll have a look tomorrow.

If you render the uv pass of a plane you should be able to see what colour values need to go where. Then it's a case of layering up grads in a layer shader, each set to add.

Place this image in the luminance channel of a shader, image sampling set to none. Make sure whatever is reflecting it is 100% reflective with no fresnel. Save the render as 32bit.

https://dl.dropbox.com/u/9875461/ST...are_Map.tif.zip

Good luck!

Thank you very much !

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.