Suzanne (monkey) UV map is not symmetrical and has bad stretching around the beginning of the ear #99331

New Issue

Daniel Gryningstjerna · 2022-07-02T00:00:47+02:00

2022-07-02 00:00:47 +02:00

System Information
Operating system: Windows-10-10.0.16299-SP0 64 Bits
Graphics card: NVIDIA GeForce 940MX/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.11

Blender Version
Broken: has never worked as expected
Worked: never worked, looking at the original task for default uv map for monkey primitive, it's wrong there also.
https://developer.blender.org/T47488

Short description of error
The current UV map for the monkey default model is not symmetrical and has bad stretching around the beginning of the ear.

Not symmetrical

Bad stretching

Expected result

This also effects the way monkey was uv unwrapped since the uv islands cannot be unfolded correctly in a straight and symmetrical line due to the seams being misplaced.
current

expected

expected result .blend
Fix_Monkey_UVMap.blend
made a quick proposal for an improved version also for the eyes, currently they are rotated in a way which makes it bad for texturing since the margins are so thin in some places that the texturer can bleed over due to midmaping in some rare cases, this version fixes it. Also looks nicer.

Improved_Monkey_UVMap.blend
Exact steps for others to reproduce the error
shift a, add mesh, monkey

enter edit mode and select all uvs in uv editor, UV, seams from islands

Add uv cheacker grid and look closely at where the ears start and notice that the seams are not symmetrical and some bad stretching around the beginning of the ear.

bug .blend:
Suzanne (monkey) UV map Bug.blend
expected result .blend:
Fix_Monkey_UVMap.blend
improved version .blend
Improved_Monkey_UVMap.blend

**System Information** Operating system: Windows-10-10.0.16299-SP0 64 Bits Graphics card: NVIDIA GeForce 940MX/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.11 **Blender Version** Broken: has never worked as expected Worked: never worked, looking at the original task for default uv map for monkey primitive, it's wrong there also. https://developer.blender.org/T47488 **Short description of error** The current UV map for the monkey default model is not symmetrical and has bad stretching around the beginning of the ear. Not symmetrical ![bad uv monkey.png](https://archive.blender.org/developer/F13246928/bad_uv_monkey.png) ![bad uv monkey2.png](https://archive.blender.org/developer/F13246931/bad_uv_monkey2.png) Bad stretching ![Bad stretching.png](https://archive.blender.org/developer/F13246956/Bad_stretching.png) Expected result ![Expected result.png](https://archive.blender.org/developer/F13246958/Expected_result.png) This also effects the way monkey was uv unwrapped since the uv islands cannot be unfolded correctly in a straight and symmetrical line due to the seams being misplaced. current ![current.png](https://archive.blender.org/developer/F13247162/current.png) expected ![Expected.png](https://archive.blender.org/developer/F13247165/Expected.png) expected result .blend [Fix_Monkey_UVMap.blend](https://archive.blender.org/developer/F13247171/Fix_Monkey_UVMap.blend) made a quick proposal for an improved version also for the eyes, currently they are rotated in a way which makes it bad for texturing since the margins are so thin in some places that the texturer can bleed over due to midmaping in some rare cases, this version fixes it. Also looks nicer. ![improve.png](https://archive.blender.org/developer/F13247256/improve.png) [Improved_Monkey_UVMap.blend](https://archive.blender.org/developer/F13247250/Improved_Monkey_UVMap.blend) **Exact steps for others to reproduce the error** shift a, add mesh, monkey ![shift a, add mesh, monkey.png](https://archive.blender.org/developer/F13246935/shift_a__add_mesh__monkey.png) enter edit mode and select all uvs in uv editor, UV, seams from islands ![enter edit mode and select all uvs in uv editor, UV, seams from islands.png](https://archive.blender.org/developer/F13246942/enter_edit_mode_and_select_all_uvs_in_uv_editor__UV__seams_from_islands.png) Add uv cheacker grid and look closely at where the ears start and notice that the seams are not symmetrical and some bad stretching around the beginning of the ear. bug .blend: [Suzanne (monkey) UV map Bug.blend](https://archive.blender.org/developer/F13246972/Suzanne__monkey__UV_map_Bug.blend) expected result .blend: [Fix_Monkey_UVMap.blend](https://archive.blender.org/developer/F13247173/Fix_Monkey_UVMap.blend) improved version .blend [Improved_Monkey_UVMap.blend](https://archive.blender.org/developer/F13247267/Improved_Monkey_UVMap.blend)

Daniel Gryningstjerna commented

2022-07-02 00:00:47 +02:00

Added subscriber: @Dangry

blender-admin commented

2022-07-02 00:00:47 +02:00

#102530 was marked as duplicate of this issue

Robert Guetzkow commented

2022-07-02 00:50:47 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Jesse Yurkovich commented

2022-11-15 19:40:21 +01:00

Added subscriber: @Vyach

Philipp Oeser removed the

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Suzanne (monkey) UV map is not symmetrical and has bad stretching around the beginning of the ear #99331