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View Full Version : help making custom bump maps

SteveN25
12-15-2008, 11:41 PM
Hi im having trouble painting my bump maps. Im creating grey scale images in photoshop first and then putting them into crazyBump to generate the normal maps. Unfortunately they dont look right. In this example its a simple texture for a tyre(ignore the middle rim area). I want to have some of the wrighting raise from the surface. It does this but not in the way I would like it to.

http://i279.photobucket.com/albums/kk150/steveWIP_pics/pB.jpg

You can see in the image the result im getting. I would like the bump to have a more chisled stamp look, not a soft dented look.

I hope you all know what I mean. I've tried lowering the white closer to 50% grey but I still get a rounded soft bump when I would like a hard flat bump....................................... (sounds a bit wrong)

If anyone could help that would be great.

cheers
steve
raylistic
12-16-2008, 12:49 AM
Trying increasing tessellation and mess around with the mental ray displacement settings. Usually i use high quality and spatial, which works well.
SteveN25
12-16-2008, 04:58 AM
sorry I meant to say that Im creating a normal map not a displacement map. i was wondering if I can make the "UNIROYAL" letters conform with the diffuse map and not the bulgy result, im getting.

cheers
steve
raylistic
12-17-2008, 02:21 AM
Increase the tessellation and the resolution of the bump map that you are baking into the normal map. If 1k is not working well, try 2k.
SteveN25
12-17-2008, 03:08 AM
Hi i think I've got it working. I never really new the difference between a bump and normal maps and what they should be used for. It turns out I should apply them as bunp maps, which give me the result im looking for. Before I was applying them as tangent normal space maps, so no need to put them through Crazybump.

Thanks anyway guys.
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12-17-2008, 03:08 AM
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