Since i found a post from R0J0hound that helped me a lot, I thought I should give something back to the community and help with this problem about colouring the tilemap. Check out the 2 examples from R0J0hound that I tweaked to have texture
How to do it yourself.
set tilemap Blend mode to "Destination out"
set the properties of the layer that the tilemap is on to:
"force own texture:Yes"
then create a layer under this one, and add the picture/texture that you want to show.
hope this one helps somebody, even if this is an old post