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Making a proper bump map in GIMP (Forums : 2D Graphics : Making a proper bump map in GIMP) Locked
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Oct 1 2010, 7:37pm Anchor

Hello.

I have a question regarding how to make a proper bump map in GIMP. I mean with any texture. I don't have photoshop nor have the money for it.
Anyway, what I did was open a image, this one to be exact.
User Posted Image
(From CG textures]

Well, then I created a blank pic the same size. I desaturated it, then went to Filters/map/bump map. I made a bump of the original pic from a drop down list, and then I get this.
User Posted Image

If I were to import the texture into Unity or some other program, it would look like this when I apply the normal texture and the map.
User Posted Image
Oi53.tinypic.com
Is this the correct way to bump map?

Thanks in advance.

Oct 24 2010, 4:17pm Anchor

Sorry for the ~20 day bump.

Take a look at Crazybump.com. It's a free (30-day trial) program that generates bump maps from a whole range of image types. It shows you a preview of how it will look, as well as a whole set of controls to change the looks of it.

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Oct 31 2010, 6:30pm Anchor

Try a more precise normal mapping plugin instead
the plugin you have might simply create grayscale bump maps
Registry.gimp.org
good luck

Arxae
Arxae Resident Stepmania Freak :D
Oct 31 2010, 8:10pm Anchor

Normal and Bump maps work in a vastly different way.
But it can be solved in 2 ways:
1. Like ChadaFACE said, get a plugin that outputs normal maps instead of bump maps
2. Tick the "Generate from grayscale" checkbox in unity (after selecting the normal map texture type)

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°w°

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