Hi Merv, nice improvements. Gary's right about distance. I usually add a bit of transparency and blur to the more distant aircraft. You want to de-saturate colours with distance.Props are an open debate on how to show them. I like to add a little bit of the prop blade. Skin texture of a plane can take hours and hours to complete. The other big one is light and shadows. I use simple 3D models as an aid to help with that. If you're not interested in creating your own there are lots of freebies to use. You want to show the contrast in colours. The last one is making sure you colour pallette is the same. Often doing the background first helps as you can then adjust your plane colours as you work. I think you're off to a flying start.