Can't use the painter on the parts of maps.

i met the problem after garrys mod 13 update is out.

the problem is,
i can’t use the painter tool to paint something on the parts of maps, such like walls, floors.
but I can paint them on ragdolls, models, etc.

Anyone knows what happened to my garrys mod?
this happens on every map.

yeah garry fucked up everything in the new ver he shoulda only added bone manipulation