
Dirt, Stairs (different Height Floors) And Black Models. 
 
		First of all hello.
 Second, I hope my English are good enough to achieve communication...
 
 In the topic now.
 When I use dirt in a map I get nice results but when the floor height is changed like in stairs, dirt leaves black lines between stairs and this turns the models black when are above it.
 
 
https://imgur.com/L8gPmVU
 
 The problem gets bigger as the models move over stairs and flash.
 
 One "solution" I thought was to use func group for all floors and set to them dirt -1.
 
 This is the result:
 
 
https://imgur.com/sAHMLG6
 
 Do you fellow mappers find the "solution" acceptable?
 
 Is there any technique to get better results?
 
 Or I have to discard dirt in closed rooms?
 
 Thanks.