Limited blood decals on some textures

[polar coral]

when i shot npcs on de_aztec's grass the blood disappears after a few shot, but when i shot them on concrete it stays there. I wonder if there's a way to make it same for both texture

[main kite]

Fault of the map

[delicate stirrup]

Fault of the engine

Displacements can have less decals than normal brushes