Paint Mode: Clone Brush #98601
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Reference: blender/blender#98601
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Goal
There are two very different implementations of the clone brush in Blender. Each with their own disadvantages.
In the image editor it is essentially just a brush that can use a stencil texture (Including the texture you're painting).:
The texture paint mode which uses the 3D cursor position to sample the colors to clone:
Proposal
There are established standards that we can follow for a more intuitive behaviour of the clone brush.
Basic Behaviour
We should follow the design of Krita for the new Clone brush. There you have the main brush cursor and a clone target cursor:
Picking a target
Picking a clone target should not be tied to the 3D cursor and related shortcuts. A more intuitive and standard approach is to use the shortcut
S
for color picking.An eyedropper button should then also be added to the brush settings to use instead of the shortcut.
It should also be possible to set a fixed clone target that won't move on repeated strokes.
By default that is the less desired behaviour but it can be useful when cloning a specific spot multiple times.
While this can be a setting in the brush, It can also be included via holding
Ctrl
while holdingS
to set the target.Painting in 3D
It's important that the colors are always picked from the screen view and painted via the view plane.
But the brush itself should be able to have a spherical falloff. Projection painting should not be strictly required.
It could also be very intuitive to pick a clone target in 3D space instead of a fixed point on the screen.
This would then allow to target a certain surface and still rotate the viewport to get the correct angle before painting.
This needs to be tested though which approach is more intuitive. Supporting both could is also an option.
Added subscribers: @JulienKaspar, @Jeroen-Bakker, @JosephEagar
Added subscriber: @Sergi-Alberca-Santamaria