CGTalk - Residual imprints around geometry

View Full Version : Residual imprints around geometry - how?

Sasho90

12-25-2008, 10:33 PM

Hi,

I don't know how to describe the problem better but I want to know how to make an effect like on the third image on that page:

http://next.extra.hu/next/tutor/urban_making/03eng.html

and particulary the residual dirt that accumulated with time in places which are occluded by geometry in the scene. How do I know the actual place where the stairs/window for instance are in the scene so I can put dirt/wearing there later in Photoshop? Hope you understood my question. :D

phix314

12-25-2008, 10:40 PM

You can do it a few ways. One way Ive done it in the past was to take an orthagonal snapshot (printsceen) and use that as a guide. The other is, if you have the ability, use your programs paint tools to draw a guide. A third is to bake the occlusion into a texture.

Sasho90

12-26-2008, 12:30 PM

Thanks for the fast response, Phix. I'll try them and see if they work. :)

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