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transfering Normal maps betweek UV setups

polycounter lvl 9
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Dylan Brady polycounter lvl 9
Hey, Im about at my wits end with this one.
Im taking several models with there own Normal maps and baking them down to one master normal map with re-arranged UVs.
When I bake them as a diffuse theres obviously problems because the tangent space has changed.

Anyone have any experience trying to do this?
Anyone even know what Im saying?

Replies

  • Ghostscape
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    Ghostscape polycounter lvl 13
    Don't bake them as diffuse. Bake them as normals.

    I had to combine a bunch of outsourced props that were spread over a bunch of (terribly thought out) texture atlases onto a single sheet. Bake the diffuse map and spec maps as diffuse (max specular bakes do not bake a specular color/power map), but bake the normal maps out as normals. You might need to dupe the meshes and bake from one to the other for normals, i forget (stick a slight push modifier on the low poly and offset it the tiniest of bits so they aren't 100% co-planar or you'll get weirdness).
  • ablaine
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    ablaine polycounter lvl 14
    Interesting. I had no idea you could bake a low poly model (or models) with a normal map to a low poly with a different set of UVs... This is also possible using xnormal? That could be definitely be useful in some cases.
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