Front texture of the Copper Doors with hinge: right blockstate and back texture of Copper Doors with hinge: left blockstate have inconsistent shading in their textures when compared to surrounding copper blocks. Issue is present with all Copper Door oxidation levels, pictured in attachments is only un-oxidized variant because the issue is most prevalent.
The shading direction for all copper blocks is generally a streak from bottom left to top right. The shading direction for the problematic Copper Door blocks are from bottom right to top left.
Suggested solution: Create an additional texture for Copper Doors with just the shading flipped, and apply it to the front of right hinged and back of left hinged Copper Doors.
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Comments 3
Yes, this is in fact typical door behaviour. However, in every other door's case, they use a unique texture which doesn't match any other block (with exception of trapdoors) but in this case, they match textures with the copper blocks. This creates a strange disparity, since all copper blocks follow this texturing format of "shade from bottom left to top right" and makes them stick out in a negative manner against the other copper blocks.
This is a change request, all doors currently flip their UV's when placed in different states/directions.