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UV mapping is the process of taking a three-dimensional mesh (X, Y and Z coordinates) and unwrapping it to a flat two-dimensional image (U and V coordinates), in order to texture the 3D model with 2D images. Use this tag for questions pertaining to UV's and UV mapping.

3 votes
Accepted

How can I determine direction of flipped UVs?

This will not work if there are procedural UV transformations. … b_mesh.faces: for loop in face.loops: if loop[uv_layer].select: face.material_index = material_index loop[uv_layer].uv
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1 vote

Baking material gets significantly darker than original colors

Each UV island samples a very small part of a pixel so the difference in the texture filtering between Cycles and EEVEE becomes very apparent. …
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0 votes

Is there a way to pack UVs to a selected area or avoid overlapping pinned UVs

New Blender has an option to preserve the position of the islands when packing with pinning them with UV > Pin. Also the UV-Packer respects the pinned islands. …
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3 votes
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Uv Island Not Straight

Create the UVs by Projecting from View while being in the orthogonal view, pin the outer border and then unwrap again and try to use Conformal method in the F9 redo panel. Can also just pin the border …
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1 vote
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Is it possible to lock one UV island and scale other (same) to be the same size as the locke...

Snapping Or if they are the same size - by using the Texel Density Checker Addon https://gumroad.com/l/CEIOR
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1 vote
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Displace modifier - undesired artifacts in texture

For displacement to work well all the faces should be equal size squares.
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