Quick question:
Is there a way, to scatter objects, either with particles or best with geo nodes, using a BW mask in the shader editor?
I have a base image as a texture, with darker and brighter spots. Using a color ramp, I have isolated all darker parts and made them white, while the rest is black. Basically giving me a BW mask for all the darker parts.
I know want to scatter objects on these, without having to manually paint a vertex group for that. Is that possible?
This is exactly the thing I’m looking for, but somehow it does not work:
So I’m using a satelite image of some fields and forests. I isolated the forest using a color ramp, and now want to scatter trees ontop. You can see the mask I baked on the right, but somehow it still scatters ontop of the whole plane.
Is there a way to preview the effect of individual nodes, to debug this?
And does the plane need to be subdivided?
Just tried subdividing the plane a bunch, which seems to do the trick
Yup, I also have the plane subdivided 3 or 4 times. 
Also, having a less noisy mask can make it look better, so does changing the multiply value to a lower or higher number, to scale the density.
