Consistent mapping boundaries of brush textures #109201

New Issue

Julien Kaspar · 2023-06-21T12:49:57+02:00

Julien Kaspar commented

2023-06-21 12:49:57 +02:00

Issue

This is based on some recent changes and #106895.
There were two different approaches in the recent past of fitting or filling the texture within a brush radius.
Whenever a brush falloff shape is changed between a circular and square shape, the texture mapping is either clipped or repeats.

Both cases can be undesirable, the right one especially because of the repeating. But the left one is more expected and leads to a consistent brush behavior.

Solution

Based on discussions between @JulienKaspar and @DanielBystedt.
The ideal beahvior is the one on the left. The mapping of brush textures needs to be updated so the texture always fits into the outer edges of the full diameter of the circular brush radius, which is the same as the outer edges of the square brush radius.

A lot of shared brush textures online already conform to a circular radius. So it's good to keep following this standard.

For the use case where the full square texture needs to be user, the user needs to change the tip roundness to be 0.0 in the brush settings.

## Issue This is based on some recent changes and #106895. There were two different approaches in the recent past of fitting or filling the texture within a brush radius. Whenever a brush falloff shape is changed between a circular and square shape, the texture mapping is either clipped or repeats. ![(Example image attached)](https://projects.blender.org/attachments/f6e82ad6-2be1-4b05-a1ee-165c8fc13169) Both cases can be undesirable, the right one especially because of the repeating. But the left one is more expected and leads to a consistent brush behavior. ## Solution Based on discussions between @JulienKaspar and @DanielBystedt. The ideal beahvior is the one on the left. The mapping of brush textures needs to be updated so the texture always fits into the outer edges of the full diameter of the circular brush radius, which is the same as the outer edges of the square brush radius. A lot of shared brush textures online already conform to a circular radius. So it's good to keep following this standard. For the use case where the full square texture needs to be user, the user needs to change the tip roundness to be 0.0 in the brush settings.

falloff_texture.jpg

137 KiB

Julien Kaspar added this to the 4.0 milestone 2023-06-21 12:49:57 +02:00

Julien Kaspar added the

Type

To Do

label 2023-06-21 12:49:57 +02:00

Julien Kaspar added this to the Sculpt, Paint & Texture project 2023-06-21 12:49:59 +02:00

Julien Kaspar commented

2023-06-21 12:54:54 +02:00

@brecht Maybe you have an opinion on this? I don't think this change would disrupt any other part of Blender.

Julien Kaspar commented

2023-06-21 13:00:20 +02:00

@JosephEagar

Brecht Van Lommel commented

2023-06-21 17:31:29 +02:00

I don't mind seeing the default changed. It will affect other cases like modifiers, where you might want repetition of tiled images textures, but it's not obvious that is the right default anyway.

Julien Kaspar referenced this issue

2023-07-12 13:44:34 +02:00

`Brush settings > Texture > Mapping` mode `Area Plane` creates a smaller mapping, cause tiling effect. #109992

Julien Kaspar added the

Priority

High

label 2023-07-12 13:44:59 +02:00

Julien Kaspar changed title from ~~Change default repeating on textures~~ to Consistent mapping boundaries of brush textures

2023-08-01 14:51:22 +02:00

Sergey Sharybin self-assigned this 2023-08-01 14:55:24 +02:00

Sergey Sharybin referenced a pull request that will close this issue

2023-08-07 15:58:22 +02:00