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multipass texture rendering how ?

Started by DMINATOR Aug 29, 2006 at 5:08 PM 1 replies 1.1k views

Original Post

Aug 29, 2006 at 5:08 PM

Hi I am having some problems understanding how to combine and render textures in multiple passes. Here are some textures I am trying to combine: After DOT 3 bump map

Ambient map, just to make some parts of the image glow in the dark

Specular pass - just adds some simple highlights

Diffuse map

Can anyone help out, atleast pointing out to the sources where blending multiple textures is explained more deeply. Source code would be also greatly appreciated. Thank you for any help.

Digitalfragment

Aug 29, 2006 at 9:42 PM

Render your DOT3 map using Blend( ONE, ZERO )
Render your Diffuse using Blend( DST_COLOR, ZERO )
Render your Ambient using Blend( SRC_ALPHA, ONE )

You'll need to work out a way of combining your specular pass with the normalmap (otherwise it wont take that into consideration), but that can be added on top exactly like the ambient map.

DMINATOR

Aug 30, 2006 at 5:52 PM

Quote:
Original post by Exorcist
Render your DOT3 map using Blend( ONE, ZERO )
Render your Diffuse using Blend( DST_COLOR, ZERO )
Render your Ambient using Blend( SRC_ALPHA, ONE )

You'll need to work out a way of combining your specular pass with the normalmap (otherwise it wont take that into consideration), but that can be added on top exactly like the ambient map.

Thank you for your suggestion, I got it working , but I am having a problem with ambient texture:

I a m trying to store it as grayscale alpha channel in normal map. But it always renders with normal texture. I have no idea how to fix that.

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