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Texture Paint: alpha not used in gradient
Open, Confirmed, MediumPublic

Description

Blender : 2.81, 4ce3fbd52ae8
You can set the transparency in the color gradient, but alpha will not be used in drawing.

Details

Event Timeline

Philipp Oeser (lichtwerk) triaged this task as Confirmed, Medium priority.

Not 100% sure this should be supported, but looks like a bug to me.

Not 100% sure this should be supported, but looks like a bug to me.

Yes. It also worked in earlier versions, but It could always be better.
I also suggest adding Random mode to the Gradient Mapping.
Random color with jitter creates a useful effect.
For example, you can create scratches of different intensities with a single brush stroke and many other things.

Maks (mac7) updated the task description. (Show Details)Fri, Sep 13, 2:02 PM

Yes. It also worked in earlier versions, but It could always be better.

Not sure about his actually. I dont see this happening in 2.79 either.
Could you tell us in which version/buildhash this was working?

I also suggest adding Random mode to the Gradient Mapping.
Random color with jitter creates a useful effect.
For example, you can create scratches of different intensities with a single brush stroke and many other things.

This is outside the scope of this bugtracker, please use other channels for feedback and requests:
https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests

Could you tell us in which version/buildhash this was working?

Thank. I meant that this is not a bug. Transparency was also not used in earlier versions.

So maybe this is even expected behavior then?
Also not sure if the alpha should modify the strength under the hood or how it would work best.
Maybe @Pablo Dobarro (pablodp606) would know more? (@Pablo Dobarro (pablodp606): feel free to close this or put on TODO...)

D5789 fixes the issue in 2D paint. I still need to check how to solve this in 3D projection painting or if it is ok to have different behaviors in the two painting modes.