I still see a difference between 6 and 7.  I am using Chipp's TerraMountainTemplate01 material.  Toward the top of the terrain is a blue section.  I added an ecosystem to this material.  In Vue 6, the eco populates only on the blue areas.  Vue 7 populates all over the place.  This is a bug.

Here is a picture of Vue 6.

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