CGTalk - Post process reflection.

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Felor

11-07-2004, 06:51 PM

Hello all,

Sometime ago I and my brother got an idea how to make post process reflection and we did some quick testing on it. We did it just for fun and now I'd like to hear if someone else wanted to test or use it.

What do I mean by post process reflection? It isn't reflection render. You still render with your 3D software but instead of rendering the reflections straight away you render the reflection ray directions. You can then quickly calculate the reflections from any environment map in post processing.

First you render this kind of refletion image.
http://felor.1g.fi/ans/cgt1.jpg

Then you can change enviorment map on reflection with out render image again.
http://felor.1g.fi/ans/cgt2.jpg

What you think about this system?
Do you know if this is already used somewhere?

Hugh

11-08-2004, 08:36 AM

I don't know about this exact technique, but a lot of places have systems for doing 2D relighting using normal and position passes....

azazel

11-08-2004, 06:32 PM

I know i'd like to try it, this could save a lot of time in some cases. So how is it done ? If you don't mind sharing...

interference

11-09-2004, 10:55 AM

hello,

it seems to be very interresting :)
which 3d app do you use (sow the teapot but...)
? how do you proceed ? i'd like to understand :)

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