Fixes double-mult issue with natural basalt wall ramps.

Author: MistakeNot4892

code/modules/materials/definitions/solids/materials_solid_stone.dm

@@ -30,6 +30,7 @@
 /decl/material/solid/stone/Initialize()
 	. = ..()
 	texture = image('icons/turf/wall_texture.dmi', "concrete")
+	texture.appearance_flags |= RESET_COLOR
 	texture.blend_mode = BLEND_MULTIPLY
 
 /decl/material/solid/stone/get_wall_texture()