Nicholas Hodgson
4 months ago
I would try the following suggestions to fix your issues. If you find they help please reconsider 1 star as most of what you are describing is user error.
1) Its turning parts invisible because you need any least 2 polygons between panel lines as this uses vertex groups to drive the masking (this is mentioned on the product page). So if you are working on very low poly geo you may have issues.
2) You only see subtle panel lines when you first run the tool because you haven't enabled thickness / increased the bevel segments so you wont see any smoothing information on your mesh. (try 4 segments with thickness enabled and you will get the results you are after.
3) The addon doesn't use creasing, it uses support loops which are added when you increase the bevel count to 4 (or add a subD modifier under the panel cutter settings)
4) This is a non destructive tool designed to help concept panel lines before committing anything to topology. If you want separated panels, collapse the modifier stack down and split them out manually.
-Nick