Thanks for replies and suggestions. As I wrote in the video description on YT, this map is not ready and under heavy development. I'm aware about a LOT of places and walls without any kind of decoration and geometry details, and I can say for sure that this map won't be release nor in alpha neither in beta untill all ambients would get an enjoyable decoration level.
@ Kaleo: video was lighten up by gamma 1.8 after recording with transcode.
@ Lava: about textures, I've used Evil8 texture set, and I think I won't switch to another texture set. I'm not a graphic designer, so I can't create a texture set on my own

. About brushwork, what do you mean? What I've written before, or something different?
@ CactusFrog: maybe, interesting idea. I need to try it

Again, thanks to all!
Codernem