Working on this, and looking for some hints to make the hills in front above the grass, look more like rolling hills. Any tips are appreciated.
Here’s one:
Atmospheric perspective:
Close up we see all colours at full saturation (if they are vivid of course), but the farther away we go, colors drop out, lightens and becomes less detailed and more blurry.
The order of dropping out is: first the yellows, then the reds and eventually the blues.
You might get a headache if you just try to do that like winging it, so I’d recommend some old landscape painting for potential colors, values & saturations.
Don’t paint in outlines, it flattens the image. Sometimes clarity in front and fuzzy as it goes to the background will give illusion of depth. Check some photos of rolling hills and how the shading of light falls on them.