vent blocks? Do you mean the lights?

Yes. It is blocky, for sure. I had a hard time in WED. I dislike this tools a bit. I have to shift every texture. When they finally fit and I do a CSG subtract then all textures are wrong again and I again have to offset all textures on every side at every block... what a mess.

Even uv-mapping is much more easy. I would rather create the level from models but then I do not get such nice soft shadows.

The biggest advantage of A6 are the nice indoor shadows / static lightmapping. But creating levels from blocks is not a pleasure at all.

At least my next level in Sphere can be a model based level. That is way more fun