Sculpting Brush size becomes too big or too small outside the object when the radius unit is in scene #111647
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Reference: blender/blender#111647
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System Information
Operating system: Windows-10-10.0.22621-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 536.99
Blender Version
Broken: version: 3.6.2, branch: blender-v3.6-release, commit date: 2023-08-16 16:43, hash:
e53e55951e7a
Worked: (newest version of Blender that worked as expected)
Short description of error
Sculpting Brush size becomes too big or too small outside the object when the radius unit is in the scene This is not file-specific it is happening in all files and for all objects. its sometimes hard to adjust the side at all when that happens. Attaching a video for reference
Exact steps for others to reproduce the error
Sculpting Brush size becomes too big or too small outside the object when the radius unit is in the scene. This is not file-specific it is happening in all files and for all objects. its sometimes hard to adjust the side at all when that happens. Attaching a video for reference
This is likely because that it can't read any depth info from the cursor when it's not above any object, then it will fall back to viewport camera focusing depth, hence it looks like that size will jump around.
To me this feature works correctly 🤔 . Since when brush is outside the mesh there will not be any effect, so I guess we could have a mechanism to preserve visual size of the brush when it leaves the surface of the mesh.
the actual size is not the issue the visual one is. As you said it is not going to affect anything cause it's outside the mesh. but when sculpting small areas really zoomed in, it sometimes causes issues when scaling the brush size. it would be really helpful if you could make a mechanism to preserve the visual size of the brush as you said.
Would be good to have steps to reliably reproduce this. Just from a startup file this is hard to reproduce.
@Ramanantc15 Or can you share a file where the bug is obvious.
Ok I'm very sure this is not a bug. But I'll wait for reproducible steps or a file for that.
I only managed to reproduce this issue when the scale of the object is not applied.
That would be a known issue. The brush cursor is scaled by the object scale to indicate that something is wrong. It's recommended to apply the scale if possible before using sculpt mode.
Hey, I'm attaching a file for you to test. This time I applied the scale and even the rotation of the object. Still have the same issue. From certain angles, it's even worse. and when trying to scale the brush radius popup that we get for scaling the brush when we press F is also not consistent. it changes differently from different angles. I also attached a video again. and to scale the object from the specific angle shown in the video. but it happens for all objects.
And in this video notice that changing the brush radius unit from view to scene and switching again is changing the brush radius automatically. I don't know if it's a bug or not, and the view distance dictated the brush size when its radius unit is in view, but I think this might have to do with the issues mentioned previously. if not kindly ignore this specific comment.
Ah I see. This is much more likely to occur on very small or large scene scales. So if the object is like 10m or 0.1m in dimensions the brush cursor is getting weird.
It's also depending on how far the view is zoomed into the object.
Getting a developer to look at this to see what's going wrong would be good.
I understand what you say. But most of the time in my specific workflow I work on small-scale props. So most of them will be small in dimension indeed. So if this cursor issue gets fixed that'll be really good to work with. That's it from me for now. So please proceed with the appropriate action from here onwards.
Apparently I could consider this as a bug, because visually you won't know if it has unapplied scale. Although hummm when use other brushes with an object with uneven scale, it will also scale the brush dab, so I don't know. Maybe it's intended
Hey these looks like this report is not yet closed. Do I have to do anything else.
@Ramanantc15 No it's all good.
I'll see if any developer can investigate this further. Maybe there's a simple solution to this.
I'm pretty sure this bug is directly related to the bug I just reported #121404 which happens when the object is NOT at the world origin (ie, location is NOT 0,0,0).