It looks really cool, the only change I would do is to lower the ambient light value on from the environment light because it looks almost all bright right now.

done crimson fists, should have pics up soon.

If we were to start a group called "exterminatus pub" or something and have an official schedule we might have a bit more success. Another mod I really like called smashball did the exact same thing and the weekly games are still going strong. I would be willing to make the group and organize a time for anyone interested if that is OK with the Dev team. Generally 12:00 noon est is the best because the Europe people have it later in the evening and even the people on the west coast of america only need to get up by 9:00 or something.

You could also alternated teams per wave for example ultramarines start then crimson fists come to reinforce them then ultramarines reinforce  etc..

I am not quite familiar with the 40k universe, could you recommend me some chapters to try to make?

Also as a bonus maybe devs/contributers should get special armor?