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(+2)

Thanks for sharing these ideas :) 

About the floors on walls, you mean that when painting grounds, walls should be removed automatically, right?

For the stairs textures, any reference image would be really welcome, so I can see what you're looking for exactly :)

Yeah. But at least I'm not the only guy who is using it so it's just a hint. :)

I used this one alot some time ago for an mmo: Ladder

Other ground textures: Textures

Your Editor reminds me on that one but for a bigger fanbase and usage.