Re: [cgkit-user] Using textures with alpha in OBJMaterial

[Matthias B. <mat...@gm...>]

Hi Maik,

On 03.04.12 09:08, Maik Riechert wrote:
>  > I suppose you are only talking about OpenGL rendering, not RenderMan
>  > rendering, right?
> 
> No, actually I'm doing RenderMan rendering with 3Delight. So is there a
> way for it? I guess so, but how?

In an obj material, the transparency is specified using the "d"
(=dissolve) parameter which is also what's implemented in the
corresponding RenderMan shader in cgkit. So you have to store your alpha
channel as a separate image and set that image as the map_d parameter.
Alternatively, you could grab the generated shader, tweak it and use the
modified version instead of the default one (using a RMMaterial object).

- Matthias -