How to get correct orientation of heightmap baked to normalmap ?

Chai

Let's say I bake a heightmap texture to normalmap via 2d program (nvidia tools, xnormal PS plugin, crazybump, etc) - since the 2d program/plugin doesn't know how the faces are rotated on the uv map - the resulted normalmap might be shifted the wrong way.

How would I go about getting the orientation right ?

Rob Galanakis

On a texture, the red channel will (almost) always be going horizontally and the green vertically. It doesn't matter what the rotation of the UV's are, if I understand your question correctly.

Chai

Thanks Rob,, I did some tests now and that seems to be the case - no matter the orientation the normalmaps always end up correctly aligned.

Though I did have the wrong settings on xnormal, which is a shame.