really weird normal map issue (3dsmax)

Joao Sapiro

hey guys i have the highpolygon and lowpolygon al set, the geometry suits each on etc, but theres a really weird issue with the normal map , when i set it to wordspace the normal map renders clean and neat, but when i set it to tangent, it seems that it mixes it with the worldspace O.o....

im using cage projection , i reseted added some push value, etc, it basically comes out clean in worldspace but in tangent this weird issue happens. no open faces, unweldde vertex at lowpoly at all

aniceto

mirrored UVs?

Joao Sapiro

yup , but the thing is i also mirrored them like this in another model, and the uvws came just fine , its the exact same procedure, and the model hasnt much assimetry

Noren

Seems to follow polygon borders.
Check if you welded together uv-vertices that don't belong together, like you welded the mirrored part of the face to the unmirrored. Check if some of your polygons have flipped normals in case you display them as double sided.
If the geometry is ok, moving the mirrored parts of the uv's outside of the 0-1 uv-space should fix the problem in any case.

Joao Sapiro

i fixed it now, what happened was that the inmirrored part of the face uvws were "side exchanged" , wich caused some confusion on the normal map generation if anyone has the same problem i can say what i did in a more explicit way.