I think its due to the geometry underneath but Im not sure how to correct it. Im surprised that FP is affected by the size of the polygons used on the surface or a quick change to a slope? You would assume that FP has the ability to scale the grass clumps in order to traverse sharp elevation changes? Whats most surprising is FP's answer to this by addign one huge grass cluster over the top pf a mound and hoping for the best...lol..It basically scaled the one cluster to patch the surface where it cant figure out what to do. I guess Ill have to get in there and even out the polygon spread but still surprised this is still an issue.