Hello
I downloaded the latest nightly, after seeing about the SeExpr feature Amy has created, but unfortunately the appimage crashes during building resources. I had seen Amy say to use 'Fill layer' so thought I'd prepare for when it's possible to try SeExpr by finding the command and learning a bit more about layers, within Krita 4.3 (Linux). Never usually use anything beyond direct painting, but found 'Layer Styles' while looking for 'fill layer' ... amazing! and it's certainly motivated me to try to learn a bit more about layers and effects. But I just cannot find 'fill layer' ... I've looked at the manual, and at every menu and off-shoot in Krita, and right-clicked on the layer. Bemused that I can't seem to find it, lol ... new glasses needed I think!

A 'Fill layer' is a type of layer, not an action performed on a layer or a layer effect.
You'll find it listed in the Add layers dropdown list at the lower left of the Layers docker.
When you add it, you can choose to have it filled with a colour, a pattern or simplex noise (in 4.3.0)

A Fill layer effectively contains its own transparency mask and if you paint on a fill layer then you paint on its transparency mask.

The latest (Jul 27) 5.0.0 Nightly appimage also has multigrid and screentone fill options but not the SeExpr option.
The latest (Jul 27) Stable appimage also has screentone and SeExpr fill options but not multigrid.
I don't know why they are different.

You'll find more information about SeExpr here:
https://krita-artists.org/t/first-alpha ... rator/8127
and:
https://krita-artists.org/t/procedural- ... ishes/7638

Thank you very much ahabgreybeard The 4.3.1 stable nightly appimage works perfectly, and I was able to find 'fill layer' and have a play with the SeExpr; really good. Thank you for the links also; will give them a good read.