I’ve had the same issue with 3DConnexion in 3D Coat for a long time. The only somewhat usable workaround I found was lowering the global speed in the 3DConnexion driver and then creating separate app specific profiles for ortho and perspective heavy workflows, but it still feels inconsistent compared to Blender or ZBrush.  

And we NEED, NEED, NEED a DESELECT (SEAMS) BRUSH in the UV tools. On models without super clean topology and UV seams (ie. RETOPO via DECIMATION and Imported STL files, etc.), it can be a major paint in the bum and major time drain to deselect unnecessary seams. I know we can clear all seams at once, but in many cases that is going too far. There may just be one difficult part, while all the others are okay. Being able to DESELECT with a Brush would make the task much more efficient and a lot faster. I have requested this multiple times. The is also an open source UV packing utility that works way better than 3DCoat's packing. I requested that a long time ago also. It's really needed, and the UV toolset has really been somewhat neglected since Andrew added GU unfolding.  

Feature request: OpenGL to power its interactive 3D and 2D UV unwrapping viewports and tool operations. * speed up the complete UV editing workflows please

This happened to me, too, and I haven't been able to tell what caused it. However, when I renamed the MY DOCUMENTS/3DCOAT directory and then opened 3DCoat 2026, it created a fresh new one and that seemed to fix the problem. Of course I have to copy the custom contents of that older one, such as Smart Materials, Shaders, Stencils, Presets and such, but for now, that fixed the missing brushes problem. 

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Paint room layer mask not working on the Beta it seems

Yep, it is and that's why it is a bit weird in use, because it packs more than one functionality - it's duplicating Add Detail functionality which can be assigned to CTRL+SHIFT action. I think, it would be more reasonable if Auto-Subdivide functionality was based on Details level only.

Ok, so pretty much old Live clay brushes.

I am referring to the General Depth value in the toolbar. You can adjust it with your brush by RMB clicking and dragging downward until the profile is flat and you can see the Depth value in the Toolbar is at 0.

It still is relative to the brush size, but higher detail values will generate more polygons within the same brush radius.

Hey, is there any good way to setup 3dconnexion devices to properly work in 3D-Coat? I find the overall experience to be broken for years now. 3D-Coat default setup is unusable, 3dconnexion doesn't work in ortho view at all. With 4.9 api it kinda works, but very inconsistent. When setup in ortho view, it works fine, but in perspective view all the movements are too rapid... When I set it up in perspective view, then it becomes too slow in ortho view.

It really depends on the model you working with. With enough "polygons", you might not need the Auto-Subdivide option or you'll need to go into negative Details level to avoid huge resolution increase. Auto-Subdivide is a bit tricky and there won't be one universal setting for all sculpt objects, you'll need to adjust it constantly.

What DEPTH value are you talking, something in Tool option panel?

yeah, I think I saw that option, could be "Details Level"?   it was set to "1" but changing it to "0.01" does not seem to have an effect. tesselation still way too dense. Only thing I´ve found was to make the brush larger. cheers

There is also an option in that Subdivide section to adjust the level of subdivsion. I made my own TESSELATION brush in the Custom Section by enabling the Subdivision and setting the DEPTH value to 0. That way it does not push or pull vertices. It creates new ones on the fly.

Ok, I don't know what is going on, but a lot off my brush presets are broken out of nowhere... both in 2025.17 and 2026.1 Tool option panel doesn't show up for many presets and the presets itself behaves way different. When I try to choose some presets, 3DC just switch to different tool. Tried to remove all presets and load them from 3dcpack, but that doesn't change a thing. Don't know if that have something to do with 2026.1 version or the newest 2026 beta, but something is seriously messed up. Oh, and why the hell I have constant info abou Several UV sets share the same name when I'm using models without UV maps? Texture - Mesh & Texture resolution doesn't do a thing. EDIT: Seems like some changes(brush engine?) was made in 2026 and it overwrites/modifies older 3DC installations. After purging all the versions and reinstalling 2025.17, all brushes are working fine. It would be nice if new versions wasn't srewing up older versions...

ah ! by adjusting the brush size

Wow, awesome !!! Thanks again for your very helpful support Is there a way to adjust, how dense the tesselation will be "drawn" to the object? Right now it is super dense

Live clay does not exist anymore. In 3DCoat 2026, the classic "Live Clay" feature is officially retired, having been replaced by a much more powerful dynamic brush system by Rygaard. The software now handles dynamic tessellation and local subdivision seamlessly within its Surface sculpting mode. Only in some brushes (in surface mode) you will find some settings belonging to Live  Clay such as the Snake Clay brush. Below I show you the steps on how you can activate the local subdivision option for the new brush system: