The latest environments have very realistic palettes and I like the brushing on the terrains. I miss more variety for the brushes though, seems like you're just using a big soft and small hard brush. Get a good brush pack like M@'s or Barontieri's brushes, and experiment.
On the matte painting WIP, nice dilapidated feel but the black holes in the building look confusing. They could use some more definition of exposed construction beams and floors and such, as well as highlights on the edges. Good mood and composition though. I'm curious as for how you did it, did you use one or many photos for the photography part?
All in all, really good job with the environments lately, keep them coming!