Vulcan in particular very gritty, exactly how you'd expect the Salamanders to be. Nice work!
That being said, that yellow wall and yellow light is not really helping your models, it makes them look very off, which I'm sure they wouldn't in real life/natural light. Maybe put them in a cardboard box lined with paper when photographing? Think it would let them stand more on their own two feet, whereas they are somewhat lost in a sea of yellow as things are.
The final note is the terminators, as their bases aren't done I don't think they're actually supposed to be posted in this forum. I know this part well because I never finish my models by basing them, and consequentially never get to post their photos in here. Keep up the good work and looking forwards to seeing more