Here’s what I have written down from @anon41087856’s guidance elsewhere:
In linear RGB, you should only use blend modes based:
- on arithmetic operations (addition, multiplication, division, subtraction, average),
- on maximum/minimum comparisons (screen blend mode)
- or on channel separations (hue, color, chroma, etc. blend modes).
Mask blend modes not recommended:
- lighten, darken, overlay, soft light, hard light, pin light and linear light.
My comment: Of course, these are recommendations for staying linear. As can be seen, when used with talent, one can obtain very interesting results.