Hey Joe, I did my mountain shading in Procreate the same way I do in Photoshop with a light hand and fuzzy brush... I don’t use any fancy selections or the eraser tool, unless of course I make a mistake... Think of it as if you were shading a drawing on a piece of paper with a pencil. Like I said, I love the soft airbrush in Procreate even better then the soft brush in Photoshop... It’s the very first brush at the top of the airbrushing section.
I always start with a new layer, under the line art, but above the background texture.
Set this layer to multiply, and then with the colour picker select a light colour from the background texture, usually a light beige colour.
Slowly add a light layer to the right side of the mountain, it will appear only slightly darker then the background, I find this helps to transition the mountains into the ground... Apply more pressure towards the top of the mountains, and less towards the bottom, fading gently into the surrounding terrain.
After this, which is hardly noticeable I add another layer set to screen... Using the same colour as you picked before do a similar process to the left side of the mountain, this will slightly lighten the other side.
Once the base shadow and light are established pick a warm brown, quite a bit darker then the original colour, and create a new layer over top of the first shadow layer, set this layer to multiply, and lightly add colour to the shadow side again, applying more pressure towards the peaks, and less towards the bottom... don’t go down as far as the first time... Adjust the opacity of the layer to suite your needs, I find somewhere around 80% usually works quite well.
Then again add a new highlight layer above the first highlight layer, and again set it to screen. Pick the same light colour as before from the background texture and reinforce the highlights focusing mostly along the top ridges with a smaller brush.
After this I usually add a new layer set to colour above the shading layers, but below the line art, and select a nice neutral grey... lightly add this colour to the peaks of the mountains, and slowly fade down towards the base with lighter pressure to fade it out towards the bottom... I generally turn down the opacity of this layer as well, play around with the slider until you find the colour you like. I personally don’t like the grey to be too pronounced, but I imagine that’s a matter of preference.
If all of this makes no sense to you at all, then check out Max’s thread here...
https://www.cartographersguild.com/s...t=32696&page=2 page 2, post #19. Though slightly different, he probably does a better job at explaining basically the same process that I’ve followed since I first read it years ago.