Collision | AI sinking into a grate model

[peter_spy]

I encountered a rather weird bug today:

The floor grate is just an .ase model, one metal material, no unusual collision models or anything. Player can walk on it just fine. Obviously, I needed a MonsterClip brush for AI, so it doesn't avoid walking on it, but again, nothing weird about its placement:

 

Is there anything wrong with this setup, or is it a bug?

[grayman]

The monster_clip brush isn't accidentally a func_static?

I know your wall paneling models have built-in m/c. Does the grate have built-in m/c? If so, what happens if you place a separate worldbrush m/c over the grate?

Have you tried changing the m/c to tdm_nodrawsolid_metal?

[peter_spy]

No no no, this one is just a one-material model, no collision hulls or anything. I put collision hulls e.g. for stairs if they feel too steep for me. Monsterclip is a brush made from scratch. I did the trick with the nodrawsolid_metal, the only drawback is that items don't fall through the grate, but e.g. I can put some loot down there, and the frob goes through. It seems like objects (moveables) react properly with those bars, just AI isn't.

Edited October 16, 2019 by peter_spy