There is a *lot* I can say about this screenshot. I'll try to keep it brief though, and give a nod to the things that you should be looking for.
There are two new details to the unit graphic spec in the pipeline.
The first is that anything that is not pure greyscale will be displayed literally. This can be seen in the details on those units. They are not a part of the camo!
Second, megamek will support the full alpha channel of .png unit files, instead of the on/off state that is currently mandated. The effect is subtle here, but there is slight shadow effect around the edges of the shown meks that blends with the underlying terrain.
Obviously, it will take time for the art to catch up to these new features, but I am very excited to have them.
Additionally, some issues with the way megamek rotates the units have been resolved. Unit rotations are now of a higher quality and no longer have jagged pixelated distortions on their edges.
It should be noted that all of the above is due to Arlith's diligent work.
I have also developed an automated method of shading existing units so that they "pop" for a better overall look and feel. The specific process shown does not work for very well for small units like infantry and protomechs, but I am working on creating a variant for that specific purpose. These tools are gimp plugins that any artist can use with just two clicks of the mouse. When these tools are ready, our artists can just create their work as they have always done, run the plugin, and voila!