Depth and light direction are the main ingredients for landscape paintings. I notice in your paintings above that you scrape the outline of everything try just doing the left or right imagining the light is coming from that direction... it makes a huge difference... also some shadow inbetween the mountains will give you more depth... and with the foreground rocks try to do them a bit darker than the rest of the background again using the light source to pick off the rock features... Keep trying and remember practice makes perfect ( although expensive on paint )
This one is on of my first attempts at landscape about 3 years ago
and this one i did recently... same kind of composition but a lot more depth and use of the light source...
