when i apply maps with alphas to objects (as decals) i'm getting some black halos around the image. is there a premultiplied option anywhere to help me remove this effects, i'm struggling to find anything.


thanks

It's strange I've just tried using textures with alpha and everything looks fine.
May be something is wrong with the texture itself in your case?
Here is a nice tutorial for texturing with alpha decals may be you will find the answer there:
http://www.edharriss.com/tutorials/tutorial_xsi_texturing_with_alpha_channels/tutorial_xsi_texturing_with_alpha_channels_part_1.htm

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Andyba, 3d artist
skills: 3d modeling, texturing, rendering, 3d character animation, compositing
3d software experience: 3ds max, Maya, Softimage XSI, Deep Paint 3d, Body Paint 3D, Wings 3D, Z Brush
2d software experience: Adobe Photoshop, Adobe After effects, Macromedia Flash, Freehand