Frankly I don’t want to be shining anyone’s shoes but seeing Hans apply his logician brain to “the sculpt problem” is just satisfying to witness, having seen his implication in geonodes. He has a very clear architectural “high level” vision, that shows. Makes me very confident whenever I see people like this refining the tool I use for my bread and butter.
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2024-02-13 Sculpt/Texture/Paint Module Meeting
Attendees
- Raul Fernandez Hernandez
- Sergey Sharybin
- Julien Kaspar
- Dalai Felinto
- Daniel Bystedt
- Hans Goudey
- Thomas Dinges
Agenda
Welcoming Raul
Raul is a new developer as part of the module.
For the time being the goal is to get him accustomed to the source code. He’ll pick up various bugs and small QoL improvements.
Julien collected a list of good task candidates and will update the module workboard to make them available.
Daniel and Julien will be available for user testing and feedback.
Hans and Sergey offered to handle code review with Sergey offering guidance on the code side.
Short term plans
Soon after there are some projects for Q1 and Q2 to tackle, which we talked about.
Dynamic Topology still needs Face Corner Attribute interpolation. Some operators support is also missing.
But major improved performance might be a long term goal istead. The Bmesh data structure will not be future proof and will need bigger refactors.
Hans pointed out that refactoring of existing features will make developing much easier. So this will be best to focus on soon. This will also lead to better performance and can happen on the side of feature development in Q2 with more devs on the module.
He shared an example Design task for code refactor .
Work on the brush assets project continues. That should make it much easier to have a large customized brush library. There is hope to have a testable build this week. Progress can be tracked in a dedicated task .
Expanding the default set of brushes will be tackled separately though.
The 3D texture paint brush project will also continue development by Jeroen but will likely for now be focused only on essential features with a new Texture Paint Mode to come after.
Coordination & next meetings
Julien will soon be taking time off until late August.
He’ll be around the official channels and available on a volunteer basis for feedback and testing.
Coordinating the meetings will be taken over by Sergey and Hans.
Meetings will continue Tuesdays 4pm CET every 2 weeks. These will ideally be short and focus on active tasks and catching up.
Workshops can be scheduled too with more time and bigger design discussions.
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Hi, any luck? Hope all is well. 
Any one having serious viewport performance lagging when using this with sculpt color brush:
I am using Blender 4.0.2.
Not sure about the scene setting but spacing of 1% is very low and can hit performance
Here we go
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on top of that, since it’s SCENE i guess the more you’re zoomed out the more it hits the performance
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Thanks a ton. 
I even increase it to like 100% with the scene setting and also scene setting for brush radius. The performance is very bad also whenever I try to paint, the brush starts to draw very zig-zaggy lines and then there is this very huge lag for about 5 to 10 mins or so before the brush recovers.
This is serious. It cannot be used. Anyone else tried this?
I guess but isn’t there a way to improve this? I think other 3d painting softwares don’t have this issue.
my understanding is it boils down to blender performance in sculpt and paint in general, i think something like this must hit the performance in other software too but they better that the performance hit doesn’t make it unusable.
in sculpt mode (standard version) it doesn’t really hit performance and it make sense that the distance is in Pixels for View and Meter (scene unit) For Scene
i can’t understand that in the previous screenshot , % in scene mode? 1% of what? so maybe the value is just crazy detailed and blender have to evaluate a tremendous amount of strokes that might be an overkill…
i will want to use scene for distance if i want to lay a certain pattern (like stitches for example) and i want them to be in a consistent distance even if i rotate around and zoom. and scene unit is better for that.
if it was a percentage in view i will assume of the size of the brush, but this will not make sense for scene mode unless brush size is locked to the zoom.
usually 10% of the brush is good for a smooth effect and good performance.
the version shared here is windows so i can’t test it myself
if it’s about texture painting another trick to improve performance is to not have that texture open in an image editor. i noticed that affects blender painting performance dramatically (specially 4k and above) everyone i tell this trick come back and thank me (big difference in performance).
i like to see my texture in the image editor and sometimes i like to paint directly on the texture (blur and fixing hard to reach corners in 3D) so i open it in an image editor but switch that editor to text editor or something while i paint in 3D
if someone can point me out to where that build is to get a linux version I would love to test too
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I just tried it on 4.0.2 and it works just fine, I can’t see any performance difference between View and Scene spacing distance. Setting the spacing to 1% makes it a little bit slow but not as bad as you mention.
Maybe you have changed another setting on the brush that’s causing that lag?
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Is development of the new quad remeshing algorithm still in progress? I haven’t seen any recent updates after the topic was split.
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You forgot the second capital “T”. 
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@Rimasson downloaded the files. The blender-3.3.0-alpha version opens but crashes when the window opens.
4.1 alpha shows an error saying The application is unable to start correctly when I try to open it.
Any idea what the issue might be?
EDIT: It works fine now. I found the issue. For anyone having this issue, make sure you move the unzipped files out of the wetransfer folder. Thanks again for sharing the sculpt branch.
Yeah, I noticed that last year so I don’t have the image editor open. I can now paint 8k textures without any issues. Might try 16k and see what happens.
Thanks for testing. Did you set your brush radius to scene as well as the spacing?
Hahaa 
Yeah, will try to remember next time.
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Yes, I tried with both settings and didn’t get any lag.
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Really? I opened a new scene. Did the same brush settings on a cube. I set brush radius to like 9mm, the lag starts when you paint zoomed very far from the cube. Performance is okay when you are close.
Also set Falloff to constant. I used voxel remesh to subdivide the cube mesh.
So I switch to ctrl + spacebar when painting.
The performance improvement is the same. 
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lol that too yeah. i used to have it in another blender window in another monitor, that’s why i didn’t think of that.
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I did the test on a remeshed sphere with around 2million vertices, with the same settings you mentioned before, and there was no visible lag, the only really noticeable difference is that the spacing between the brush daubs gets bigger when you paint zoomed out far from the model, so any brush stroke starts to look like a dotted line, but no lag.
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Hmmm… 
Can I ask what gpu you are using?
I get that dotted line too, but when spacing is set to scene. The lag is huge. I am using a Wacom Tablet. I am not sure if that might be a contributing factor.
Are you creating the strokes with a mouse? or you are using maybe a screen drawing tablet?
I tried with both mouse and tablet, I have a Wacom Intuos, and my GPU on my main work PC is a 3080ti. Then I also tried on my laptop, with a 3050 laptop GPU and there wasn’t any lag either
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