Convert normal map to bump map?

Does anyone have a good way of converting a normal map to a bump map? I am using GIMP but Photoshop would work too.

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5 Answers

I've used this method in the past Scott, it's easy three steps http://www.textureshock.com/tutorial2.htm

 
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There is also a software http://www.crazybump.com/
Haven't tried that though as it needs a 32bit win:)

 
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There's also http://www.quixel.se/ NDO just launched version 2, integrated right inside Photoshop.

 
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I just purchased the Shadermapper, it was like $40 and worth it. Befor that I was using SSBump and that did well for me it is freeware.

http://shadermap.com/home/

http://ssbump-generator.yolasite.com/

 
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