UV-editor: Snapping to a Fixed-grid does not work. #143
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Original bug report: https://projects.blender.org/blender/blender/issues/157237
System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1050 NVIDIA Corporation NVIDIA 581.80 Vulkan Backend
Blender Version
Broken: version: 5.1.0, branch: blender-v5.1-release, commit date: 2026-03-16 18:50, hash:
adfe2921d5f3Worked: Blender 5.0.0
Short description of error
Snapping to the Fixed-grid set up in the Overlays menu does not work in the UV editor.
Exact steps for others to reproduce the error
1 — In the Overlays menu, select the «Fixed» grid type and set arbitrary values in both fields;
2 — In the Snapping menu, select the snap type «Grid»;
3 — Select any UV-element and try to snap it to the grid.
Report is clear
LLM Reasoning
Got it, let's see. The bug report has a clear title, short description of the error, and exact steps to reproduce. The steps are numbered and easy to follow. Even though there's system info, we ignore that as per instructions. The clarity is good—does it clearly describe the issue? Yes, because the steps and description make sense. So the answer should be 'Yes'.
JSON Data
{
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"processing_time": 5.696496
}
Report is specific
LLM Reasoning
Got it, let's analyze this bug report. The title is "UV-editor: Snapping to a Fixed-grid does not work." The body describes a specific issue where snapping to a fixed grid in the UV editor doesn't work. The steps to reproduce are detailed: setting up the fixed grid, selecting snap type, and trying to snap a UV element. This is about a specific feature (UV editor's fixed grid snapping) rather than a vague problem like just "crashing while rendering." So it's a specific issue.
JSON Data
{
"llm_judgement": true,
"processing_time": 7.1544870000000005
}
Report flagged as NOT a duplicate by LLM
UV: Grid Snap Base options is not working
https://projects.blender.org/blender/blender/issues/145782
System Information
Operating system: Windows 11
Graphics card: RTX5070Ti
Blender Version
Broken: 4.5, 5
Worked: Unknown
Snap Base options are inactive and do not function when "Snap to Grid" is enabled
Exact steps for others to reproduce the error
Expected Behavior
Snap Base options should be active and functional when snapping to grid is enabled, allowing users to define the reference point for snapping
Actual Behavior
Snap base options remain grayed out and non-functional, even when "Snap to Grid" is active. As a workaround, I currently use the grid plane as a reference.
This future was mentioned in #78391 and #88990 Both were closed or marked as finished, but the issue appears to persist or may have regressed.
LLM Reasoning
Got it, let's analyze these two bug reports. First, look at the descriptions and steps.
Bug report 1 is about UV-editor: Snapping to Fixed-grid not working. The steps are setting Fixed grid in Overlays, selecting Grid snap, then trying to snap a UV element. So the issue is that snapping to the fixed grid doesn't work—maybe the snap isn't happening as expected.
Bug report 2 is about UV: Grid Snap Base options not working. Steps are enabling grid (Fixed or Pixel), turning on Snap with Grid Target, then trying to access snap base settings (closet, center). The problem here is that the snap base options are inactive when snapping to grid is enabled.
Wait, but let's check if they're the same. Bug 1 is about the snap not working at all (maybe the element doesn't snap), while Bug 2 is about the snap base options being unavailable. But maybe they're related? Wait, no—Bug 1's steps are about snapping to grid, and Bug 2's steps are about accessing snap base settings when grid snap is on. Are these the same issue?
Wait, let's re-read. Bug 1: "Snapping to the Fixed-grid set up in the Overlays menu does not work"—so when you try to snap, it doesn't work. Bug 2: "Snap Base options are inactive and do not function when 'Snap to Grid' is enabled"—so the settings for snap base (like closet/center) are grayed out. Are these two different aspects? Or maybe the same underlying issue?
Wait, but the user's question is if they're the same issue based on description and steps. Let's check the core problem. Bug 1: Snapping to grid doesn't work. Bug 2: Snap base options don't work when grid snap is enabled. Are these duplicates? Maybe not, because one is about the snap action failing, the other about the settings being unavailable. But maybe they're related. Wait, but let's see the steps.
Bug 1 steps: set Fixed grid, select Grid snap, try to snap UV element. So the result is that snapping doesn't work (maybe the element stays in place). Bug 2 steps: enable grid, turn on Snap with Grid Target, then try to access snap base settings—those are inactive. So different issues? Or maybe the same bug where when you use grid snap, something breaks either the snap or the options.
But the question is if they're duplicates. Let's think: Bug 1 is about the snap functionality (the actual snapping), Bug 2 is about the UI options for snap base being disabled. Are these two different issues? Or maybe the same bug causing both?
Wait, but the user wants a single word: Yes or No. Let's check again.
Bug report 1: Snapping to Fixed-grid does not work. Steps: set grid, select grid snap, try to snap—so the snap doesn't happen.
Bug report 2: Snap Base options are inactive when Snap to Grid is enabled. Steps: enable grid, turn on grid snap, then try to access snap base settings—they're grayed out.
Are these the same issue? Maybe not. Because one is about the snap action failing, the other about UI options being disabled. But maybe they're related. However, based on the descriptions and steps, are they duplicates?
Wait, let's see the titles: Bug 1 is "UV-editor: Snapping to a Fixed-grid does not work." Bug 2 is "UV: Grid Snap Base options is not working". So different focuses. Steps: Bug 1 is about performing the snap, Bug 2 is about accessing snap base settings. So probably not duplicates. Therefore, answer is No.
JSON Data
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"duplicate_report_number": "145782"
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Report flagged as NOT a duplicate by LLM
Grid snap in UV Editor also snap to vertices
https://projects.blender.org/blender/blender/issues/122787
System Information
Operating system: Windows-10-10.0.17763-SP0 x64
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 | 4.6.0 NVIDIA 555.85
Blender Version
Broken: 4.2.0
main2024-06-051c92d26bfc8dWorked:
Short description of error
Grid snap in UV Editor also snap to vertices
Not quite sure if this is expected behavior for (ongoing) snap redesign.
Exact steps for others to reproduce the error
Default startup
LLM Reasoning
Got it, let's analyze these two bug reports. First, look at the descriptions and steps.
Bug report 1 is about "Snapping to a Fixed-grid does not work" in the UV editor. The steps are setting up fixed grid, selecting snap type Grid, then trying to snap UV elements.
Bug report 2 is about "Grid snap in UV Editor also snap to vertices"—so here, when using grid snap, it's snapping to vertices instead of just the grid. The steps are switching to UV workspace, moving verts away from grid, enabling grid snap, moving again.
The key difference: Report 1 says snapping doesn't work at all (no snap), Report 2 says snapping works but incorrectly (snaps to vertices). So they're different issues. Therefore, the answer is No.
JSON Data
{
"llm_judgement": false,
"processing_time": 11.641812,
"duplicate_report_number": "122787"
}
Report flagged as NOT a duplicate by LLM
UV Incremental snapping with non-square grid (e.g. Grid set to "Pixel" for non sqaure images) incorrect on the Y axis
https://projects.blender.org/blender/blender/issues/140718
System Information
Operating system: Windows-10-10.0.26100-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1660 Ti/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 572.70 Opengl Backend
Blender Version
Broken: version: 4.5.0 Alpha, branch: main, commit date: 2025-05-18 22:07, hash:
e1ac6a75d51aBroken: 4.4
Broken: 4.2
Worked: Unsure
Short description of error
When using non-square textures (E.g. A texture that's 64x40 pixels), then incremental snapping on the Y axis will be incorrect.
Exact steps for others to reproduce the error
LLM Reasoning
Got it, let's analyze these two bug reports. First, look at the descriptions and steps.
Bug report 1 is about snapping to a Fixed-grid not working in the UV editor. The steps involve setting a fixed grid in Overlays, selecting snap type Grid, then trying to snap a UV element.
Bug report 2 is about incremental snapping with non-square grids (like pixel grid on non-square images) being incorrect on Y axis. Steps include using a specific blend file with a 64x40 image, enabling incremental snapping, moving a vertex—X snaps but Y doesn't.
The key differences: Report 1 is about Fixed-grid not working at all (snapping fails), Report 2 is about incremental snapping on non-square grids having Y-axis issues. The problems are different—one is general fixed grid snap failure, the other is specific to non-square grids and incremental snap's Y axis. So they're not the same issue.
JSON Data
{
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"processing_time": 13.736658,
"duplicate_report_number": "140718"
}
Report flagged as NOT a duplicate by LLM
Grid & Pixel snapping in the UV editor
https://projects.blender.org/blender/blender/issues/78391
It would be very helpful to have grid and pixel snapping in the UV editor. Also, being able to quickly snap the 2d cursor to a vertex and then rotate from the 2d cursors pivot point would be great. We can currently snap the 2d locator to vertices by using shift+S and use "cursor to selected", but being able to snap to vertices directly could speed up the process when creating modular assets for environments.
Proposal updated 2022-09-10 after discussion with Campbell in the comments below
UI
Change the current grid options in the uv overlay menu into an enum of 3x items [ Dynamic | Fixed | Pixel ] where dynamic is the current default "Fixed" for "Fixed Subdivisions" checkbox and "Pixel" would be a new option to align the grid to pixels. "Fixed Subdivisions" could have an X/Y setting instead of a single value.
See more info about dynamic grid here
#78389
Grid overlay on top of images
Optionally show the grid on top of the image as an overlay option since it's not possible to see the grid with an image at the moment.
Rename snap to pixels
Rename "Snap to Pixels" to "Rounds to Pixels" (or another names that avoids the term "Snap") this is a post-process when transforming, it's not applied as part of the snapping.
Desired behaviour - starting point (part 1)
Green arrow shows intended mouse movement and snap target when using “snap to dynamic grid”.
Desired behaviour - final snap result (part 2)
Green dot shows snap point for where dynamic grid and closest vertex meet up when using “snap to dynamic grid”.
LLM Reasoning
Got it, let's analyze the two bug reports. First, look at the description and steps for each.
Bug report 1 is about "UV-editor: Snapping to a Fixed-grid does not work." The steps are: set fixed grid in overlays, select snap type Grid, try to snap UV element. So this is a problem where snapping to the fixed grid isn't working—like a bug that it's broken.
Bug report 2 is titled "Grid & Pixel snapping in the UV editor" and talks about wanting grid and pixel snapping, proposing changes (dynamic/fixed/pixel enum), showing grid over images, renaming snap to pixels. It's more of a feature request or proposal for improving snapping, not reporting that existing snapping doesn't work. The steps here are about desired behavior, not reproducing an error.
So the first is a bug where snapping fails, the second is a feature request/idea for enhancing snapping. They're not the same issue. So answer is No.
JSON Data
{
"llm_judgement": false,
"processing_time": 14.455022999999999,
"duplicate_report_number": "78391"
}
Report flagged as NOT a duplicate by LLM
Crash in UV Editor with Grid snapping
https://projects.blender.org/blender/blender/issues/140716
System Information
Operating system: Windows-10-10.0.26100-SP0 64 Bits
Graphics card: NVIDIA Corporation NVIDIA GeForce GTX 1660 Ti NVIDIA 572.70
Blender Version
Broken: version: 4.5.0 Beta, Commit date: 2025-06-19 19:03, hash:
f3b0600083edversion: 5.0.0 Alpha, Commit date: 2025-06-19 21:28, hash:
fe0fe0a5ed50Worked: 4.5.0 Alpha, Commit date: 2025-05-18 22:07, hash:
e1ac6a75d51aShort description of error
Crashing when trying to move vertex in UV Editor. Crushes with Grid and Vertex Snapping. Increment Snapping is working. Looks like Blender is cashing when tries to draw a snapping widget (small circle). Crashing both on Vulkan and Open GL
Exact steps for others to reproduce the error
Try move UV
LLM Reasoning
Got it, let's analyze these two bug reports. First, look at the descriptions and steps.
Bug report 1 is about snapping to Fixed-grid not working in UV editor. The steps are setting grid type, selecting snap type, trying to snap a UV element.
Bug report 2 is about crashing when moving a vertex in UV Editor with Grid/Vertex Snapping. Steps are just "Try move UV" and mentions crashing when drawing the snapping widget.
The issues are different: one is a functionality problem (snapping not working), the other is a crash (crashing during snapping). So they aren't the same issue. Therefore, the answer is No.
JSON Data
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"processing_time": 10.473009,
"duplicate_report_number": "140716"
}