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+--- Thread: Inverted geometry (normals?) in alembic file. (/thread-3851.html)
Inverted geometry (normals?) in alembic file. - kurt_hectic - 09-04-2023
Hello,
No matter if I select "flip explicit normals" on the alembic file export, my geometry is flipped. In Unreal Engine and in 3ds max (when I import it from the file)
Help please!
RE: Inverted geometry (normals?) in alembic file. - tyFlow - 09-04-2023
If your importer doesn't respect explicit normals, you may need to check "flip face vertex order" as well. That will change the winding order of the face vertices and implicitly flip the normals.
RE: Inverted geometry (normals?) in alembic file. - kurt_hectic - 09-05-2023
juhu! it worked, thank you!
Just please take a moment to think about naming. Maybe it's just me, but that was a classic "inverted normals" problem. So those two settings were misleading a bit.
Vertex order fixed flipped normals? Sounds weird.
RE: Inverted geometry (normals?) in alembic file. - tyFlow - 09-05-2023
Implicit normals in all applications are determined by face vertex order. The reason the checkbox doesn't just say "flip normals" is because it won't necessarily flip the normals, if the application also reads the explicit normals.
I guess I can add info about implicit normal flipping in parenthesis.