**System Information**
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: Radeon RX550/550 Series ATI Technologies Inc. 4.5.13587 Core Profile Context 20.4.1 26.20.15029.20013
**Blender Version**
Broken: version: 2.90 (sub 0), branch: arcpatch-D7314 (modified), commit date: 2020-04-17 15:25, hash: `rB0e2de2b21201`
Worked: Never
**Short description of error**
Output of various blend modes is different depending on whether byte or float image is blended
Right now I am not sure which result is correct (or if any)
In example file Blend is set to Linear burn with brush strength of 0.5 (I assume this will give brush pixels alpha of 0.5)
I have found this bug while working on D7314, so I can work on fixing blend modes as well, or at least I would like to be involved in how this will be fixed. Of course, if this is actually bug and not only me being dumb.
**Exact steps for others to reproduce the error**
{F8479363}
# Open file
# Paint both textures with pre-set brush
Result is different
As a consequence, some blend modes also work unexpected in the Video Sequence Editor, see T76376, T74440, T79333 for details.
Also note that this was once changed in {rBfdee84fd567a}, so we are now in a "fix-for-fix" scenario...