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  How do normal maps work?  (Read 708 times)
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Offline ags1

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Make code not war!


« Posted 2013-04-22 22:51:21 »

Does anyone know a good tutorial or intro to normal maps?

To get a smooth appearance, does the normal map have to get matched to the geometry? Or is it possible to create a generic 'smooth normal map'? Is it possible to generate the normal map in a shader? I have semirandom terrain and I want the grass to be smooth and the rock to be rough, so I guess I have to generate the normals for the grass normal map by interpolating the verteces?

Offline davedes
« Reply #1 - Posted 2013-04-22 22:58:09 »

I have a tutorial here, although it mostly focuses on 2D. There are some links for 3D at the end of the tutorial.
https://github.com/mattdesl/lwjgl-basics/wiki/ShaderLesson6

Typically you might sculpt detail using a program like ZBrush, or simply generate a normal map from something like CrazyBump. Then you apply the normal maps to your low poly terrain to create the high quality look.

Offline ags1

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Make code not war!


« Reply #2 - Posted 2013-04-22 23:17:56 »

Thanks, I'm going to work through the tutorials!

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