Tangent Normal Map produces reversed effects

Question

I've created Tangent Space normal maps in Blender (from $$anonymous$$-ploy sources) to apply to my objects. However when I bring the object into Unity and apply the map the textures appear reversed; concave areas appear convex etc. The Normals themselves are correct and render correctly in Blender.

How do I get the Normal Maps to display correctly?

Cheers

psullie

Answer 1

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Answer by Peter G · Oct 02, 2010 at 12:18 PM

Blender uses the opposite Red and Green for normal maps. You have to flip the red and green channels to meet the industry standard.

http://forum.unity3d.com/threads/35110-Normal-mapping-flipped.?$$anonymous$$ghlight=Normal+flipped

http://forum.unity3d.com/threads/23177-Normal-Maps-vs.-Hi-res-Meshes

http://wiki.blender.org/index.php/Doc:Manual/Render/Bake (At the bottom of the page)

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psullie · Oct 02, 2010 at 01:57 PM 0

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Steven-1 · Nov 21, 2011 at 03:48 PM 0

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Tangent Normal Map produces reversed effects

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