Zero Instances in Object Population

[rcallicotte]

I'm getting zero instances, when I create an object population (Populate Now), when I use the Painted Shader I've created. But, when the Painted Shader is inverted, everything is fine. Anyone see this before and / or have any suggestions?

[rcallicotte]

I might have just now figured this problem out. If the "Sample terrain and density shader before moving and rotating area" is checked (under the object population Seed tab), then I get the zero population. Otherwise, it's fine. This means I will not check this box.