ID 439179 - Incorrect painting occurs when using the Tow Brush with 8-bit color depth enabled.

Problem summary
Incorrect painting occurs when using the Tow Brush with 8-bit color depth enabled.

Customer reported version
mari.n/a

Customer reported platform

Steps to reproduce

1) From Mari, load the example head project.

2) Select the Tow Brush and set the Paint Buffer Tool Properties for 8-bit.

3) Draw a selection of baked paint, then click and drag the tow to another area, observing the paint.

Expected behavior
The paint should not have hard edges or appear with a coloration issue.

Actual behavior
The towed paint appears with incorrect graphics while in 8-bit paint buffer.

Workaround

Paint with a 16-bit Paint Buffer.

Reproduced by Support in
Mari 4.6v4 - macOS 10.13.6, Windows 10
Mari 4.6v3 - macOS 10.13.6, Windows 10
 

Unable to reproduce bug in:
Mari 4.0v1 - Windows 10
Mari 3.4v4 - macOS 10.13.6

Earliest version tested
Mari 3.4v4 - This issue doesn't appear in this version and has regressed