Hi,
in Photoshop the mixer brush (wet paint) has a “sample all layers” option so the wet brush can pick color from the layers behind the current layer. I can not find this option in Artstudio Pro, does the app support this feature? At least it should work like the smudge tool in a transparent layer.
I have moved today from Procreate because the limit on the number of layers, having unlimited layers is really great, but I need this feature to keep using my workflow.