Mixing materials

[janina-overley]

Could anyone tell me whether it's possible to mix two materials on an object using a map as a mask between the two?

Such a simple task in Max

I'm trying to model a glass object with a logo painted on it

thanks

[pomme]

Apply an alpha channel.

[janina-overley]

WHERE ???

I'm trying to mix MATERIALS not texture maps

[devdoka]

You cannot 'mix' materials in SI3D as only one material is allowed per triangle. You'll have to use XSI to do true material mixing.

However, you can blend textures up to 64 textures per triangle (2D and 3D) which is what I think he was referring to. If you need to only mix materials (eg - solid color), then apply the appropriate shading model (phong, blinn, etc...), then apply a 2D_Local texture atop with the proper color. Since the texture is solid colored, you can get away with a 1x1 pixel image to smear it across. To blend, use the blend slider in the 2D (or 3D) texture editor. Use the 'Next' and 'Prev' buttons to apply more textures to the same triangles.

Matt

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Matt Lind
Animator/ Technical Director
Softimage certified instructor:
Softimage|3D
Softimage|XSI
speye_21@hotmail.com

[janina-overley]

Thanks for your reply Matt

I've found that I can get close enough to the effect I wanted - that of non-transparent paint on a semi-transparent (glass) object - by setting the paint texture's Transparency in the 2D Texture File Box to -1

It is unfortunate that there's no way of mixing lighting models

Thanx again

[devdoka]

Well.....technically there is a way, but it's ugly as it involves null heirarchies and many, many, many, many expressions. And no, I won't show you as it's much too involved to explain here.

Matt

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Matt Lind
Animator / Technical Director
Softimage certified instructor:
Softimage|3D
Softimage|XSI
speye_21@hotmail.com