One approach I have noted while writing fiction bears a striking similarity to watercolour painting.
I have been dabbling in watercolours for about half a decade (as I write this) and it took me a good chunk of that time to get my head around the true power of watercolour painting: layers.
For a long while I was making reasonably good paintings with a technique that was closer to colouring in the lines: I would sketch something in pencil, then paint it in, mixing my colours in the tray. The results were okay.
Then I took a class and was forced to learn about layers.
Watercolours are semi-transparent, and when used in particular way can be built up layer by layer to add tonality, depth, blends and dimensionality. Draw a three dimensional cube. Paint all three visible sides with one layer, then paint two of the sides with another layer of the same paint, and then paint one side with a final layer, again with the same paint: voila, you have three shades of paint, implied shadows, and a depth that wouldn’t exist without this simple bit of layering technique.
I started to think what that looks like with words. We storytellers sometimes rush through a scene to describe it, but what if we painted back over parts of that scene with additional layers, again and again, until the depth and dimensionality we were seeking appeared right there on the page.