Darth Lars:
Something that I still think stand out like a sore thumb are the soldiers in the back. They look like ghosts. Can they be made to look like the other soldiers?

Could the hole in the floor be lit more? Perhaps add some glow?

I think that the color of the walls could still be tweaked just a little bit. The walls are still a little bit purple and some highlights in the floor are still a bit more blue than the walls. Perhaps add just a little bit blue to the walls. Just a small step - not even halfway to how it is on the DVD. The walls are grey, but they are lit by a cold light.

Don't forget moving landing lights in the floor and patrolling TIE fighters outside.

Well, I don't want to change everything. I don't mind the officers at the back as they're varied from the mass of troops and I might add troops behind them.

The walls are not purple, they've been desaturated. And they're lit with white light, so they wouldn't tint. The floor isn't finished yet, so any blue will be removed and I'll probably add some glow from the forcefield.

I don't know if I'll be adding back in TIEs outside, we'll see.

But I think that the planet should look smaller than Endor. Compare with how the Earth looks from the Moon.

The planet Endor is a gas giant and would look much bigger than Earth from the Moon if they were at the same distance. However, it's unlikely a gentle, habitable moon would exist at that distance because of tidal forces, so it probably should be place further away. It's all about perspective as to "how big" it looks, so a person's perception of what looks right or wrong sort of depends on whether they understand what is being shown.