I came across this video, a long time ago, it is about painting a mountain scenery in gimp paint studio.
In this video Ronnie Tucker teaches; how to paint a Yosemite Bob Ross mountain with lake scenic painting using the gimp paint studio.
I practise it too. It was fun.
Gimp is a free open-software for graphics.
Visit their website to read more.  http://www.gimp.org/ Â
Gimp software needs to be upgraded to gimp paint studio to enable one use some features.
Gimp paint studio; enables one to paint using the gimp software.
Have fun watching.
Happy digital painting!