vegetation biomes (not rectangles)

[yonson]

Hi, I'm trying to create a forest biome (basically just a set area on my map where I want to specify a polygon area, and create a forest on it, but only on that area). I used to use Vegetation Studio Pro for this, out of the box gaia pro is of course AMAZING, but I can only place forest biomes as either WORLD or LOCAL, where local is a rectangle (as shown). So basically all I want to be able to do is make the blue square into any shape I want.

Is this possible in Gaia? and if not is this out of the box possible in Gena? Thank you!

 

[Bryan]

Yes, you can add an image mask here: 

And then then put your image of whatever shape you want. 
Then spawn local.