wow Wabe, thanks for the tip... could be why the 'x' shaped grass patches of my ecosystems always seem to invade my streets and curbs slightly.

Jim, you too have a point, VUE seems to be sensitive to small images... trying at least a 1024x1024 map may help Leo??!

and - I see you have 'populate below foreign object' checked, did you try unchecking this? (must if you use Talley's suggestion)

Also, did you try changing the slider for 'smooth blending strip' closer to 0 instead of 100?  Not sure exactly what this does, but I have a theory, and wanted to see if it works... maybe vue is 'blurring' your trail for you with this, and you don't want it blurring that line?