CGTalk - Multiple UV Sets and Bump mapping

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sasquatch

08-08-2002, 01:55 PM

Boy, is this doing my head in.

I'm, working on a head at the moment; it has, at present, 2 UV sets; the default one, which I'm using for Fur maps as they only like to work on the defauly set, and a second for skin textures. However, whenever I assign a bump map to the surface, it uses the default UVSet, instead of the texture one (even if I set the current UV set to be the texture set). When I go to change the UV Set in the UV linking panel, I get no option to alter the bump map, only the colour and specularity maps. What's going on? is there a way I can get round this in the hypershade?

sasquatch

Waboflex

08-08-2002, 06:06 PM

I don't think you really have a choice there sasquatch, you probably know already that you can't have multitextured bumps maps (i.e. the bumps will only work with one UV set), and I suspect this means bump mapping only recognises the default UV set. So you can't put it in another set even if it's the only one used by the bump. Apparently this will be fixed in 4.5, so if you can wait until September... :shrug:

(Mind you, I could be wrong about this, it's been a while since I worked with multitexturing and fur and stuff).

Anyway, a possible (though somewhat clumsy) workaround is to have a duplicate head which has the fur UV's (and fur), and make that head invisible. The original head (which now has no fur) could then be returned to a single UV map for the colour, specular and bump etc. Of course then there's the problems of animating them together, but that's not usually too difficult.

Hope it helps.

Wabo.

beaker

08-08-2002, 08:33 PM

I know 4.5 has support for fur and bump uv's in the other uv sets other than the base. So if you have time to move to 4.5 they your all set. Otherwise you have to stick with the base uv set for everything if you want bump.

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