Improved Rake functionality #98070

New Issue

For now it would be best to focus this implementation on Sculpt Mode, since this will be the basis of the upcoming Paint Mode.

Issue

When using an image texture in a brush you can enable the option "Rake" so that the texture rotation is following the direction of the stroke.
This has a huge issue that it stamps the entire texture repeatedly which makes it impossible to create a smooth curved texture that accurately follows the stroke.

Proposal

Essentially we need to implement a way to split up the brush texture into many thin slices and apply them to the stroke incrementally.
This way it will have the visible effect of putting the texture on a paint roller and rolling it over a surface.
This would also make it possible to assign a very wide texture to a brush and paint it in a curved way on the surface.

roll brush mockup.mp4

Adjusting the texture size should help to redefine how stretched the used texture is:

Size = 1

Size = 0.25

Size = 2

Open Questions

It still needs to be discussed how this setting will be exposed and how it relates to the mapping, stroke and rake setting.

For now it would be best to focus this implementation on Sculpt Mode, since this will be the basis of the upcoming Paint Mode. ## Issue When using an image texture in a brush you can enable the option "Rake" so that the texture rotation is following the direction of the stroke. This has a huge issue that it stamps the entire texture repeatedly which makes it impossible to create a smooth curved texture that accurately follows the stroke. ![F13080487](https://archive.blender.org/developer/F13080487/image.png) ![F13080519](https://archive.blender.org/developer/F13080519/image.png) ## Proposal Essentially we need to implement a way to split up the brush texture into many thin slices and apply them to the stroke incrementally. This way it will have the visible effect of putting the texture on a paint roller and rolling it over a surface. This would also make it possible to assign a very wide texture to a brush and paint it in a curved way on the surface. [roll brush mockup.mp4](https://archive.blender.org/developer/F13080440/roll_brush_mockup.mp4) Adjusting the texture size should help to redefine how stretched the used texture is: Size = 1 ![F13080507](https://archive.blender.org/developer/F13080507/image.png) Size = 0.25 ![F13080509](https://archive.blender.org/developer/F13080509/image.png) Size = 2 ![F13080511](https://archive.blender.org/developer/F13080511/image.png) ### Open Questions It still needs to be discussed how this setting will be exposed and how it relates to the mapping, stroke and rake setting.

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

Added subscriber: @JulienKaspar

#98182 was marked as duplicate of this issue

Added subscriber: @Harti

Added subscriber: @Vyach

Closed as duplicate of #98182

Changed status from 'Duplicate' to: 'Confirmed'

Added subscribers: @DanielBystedt, @JosephEagar, @lichtwerk, @Grady, @luischerub, @TheRedWaxPolice, @Jeroen-Bakker

@DanielBystedt I merged your design task into this one. The visual examples are extremely helpful! Thanks

@JosephEagar If you already have any technical information to add, feel free to edit the task further.

@DanielBystedt I merged your design task into this one. The visual examples are extremely helpful! Thanks @JosephEagar If you already have any technical information to add, feel free to edit the task further.

Added subscriber: @Zeekar

During sculpt/texture module meeting 2022-05-18 we agreed that the best solution is to add this feature as a new stroke method called roll. This will be the best solution looking forward to the planned brush management.

Attendees:
Jeroen Bakker (dev)
Ramil Roosileht (dev)
Julien Kaspar (artist)

During sculpt/texture module meeting 2022-05-18 we agreed that the best solution is to add this feature as a new `stroke method` called `roll`. This will be the best solution looking forward to the planned brush management. Attendees: Jeroen Bakker (dev) Ramil Roosileht (dev) Julien Kaspar (artist) ![image.png](https://archive.blender.org/developer/F13087335/image.png)

The additional advantages to making it a stroke method are also that it is easier to select & use and that there are other potential brush effects:
If a texture or the falloff itself is applied over thin slices along the direction of the stroke, it would be easier to achieve sharp cuts like with the Draw Sharp brush.

The additional advantages to making it a stroke method are also that it is easier to select & use and that there are other potential brush effects: If a texture or the falloff itself is applied over thin slices along the direction of the stroke, it would be easier to achieve sharp cuts like with the Draw Sharp brush.

Added subscriber: @Nico-Cook

Added subscriber: @Michael-Colina

here is some bug occurring here, not my post here is the original https://blenderartists.org/t/the-big-blender-sculpt-mode-thread/1150731/10031

here is some bug occurring here, not my post here is the original https://blenderartists.org/t/the-big-blender-sculpt-mode-thread/1150731/10031 ![Screenshot 2022-05-23 173944.jpg](https://archive.blender.org/developer/F13101549/Screenshot_2022-05-23_173944.jpg)

Added subscriber: @tiagoffcruz

Added subscriber: @robin-4

Added subscriber: @Yuro

Removed subscriber: @Michael-Colina

Added subscriber: @Tilapiatsu

Since this is targeted for 3.5 I'll raise the priority.

I just tried the temp-sculpt-roll-mapping branch. I think the deformation of the alpha texture along the stroke works great! Well done! The only issue I can find is when the angle is set to 90. The stroke only becomes thin, straight streaks perpendicular to the stroke

Attaching example file for quick testing

blender roll test.blend

I just tried the temp-sculpt-roll-mapping branch. I think the deformation of the alpha texture along the stroke works great! Well done! The only issue I can find is when the angle is set to 90. The stroke only becomes thin, straight streaks perpendicular to the stroke ![image.png](https://archive.blender.org/developer/F14086871/image.png) Attaching example file for quick testing [blender roll test.blend](https://archive.blender.org/developer/F14086874/blender_roll_test.blend)

I just tested the latest build
Blender 3.5.0 - temp-sculpt-roll-mapping from December 31, 00:54:28

That build of blender still has the issue when setting the angle to 90 described in my last post

I just tested the latest build Blender 3.5.0 - temp-sculpt-roll-mapping from December 31, 00:54:28 That build of blender still has the issue when setting the angle to 90 described in my last post

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Improved Rake functionality #98070

Issue

Proposal

Open Questions