Surface continuity checker? Class A

In Alias… there is a tool to check the continuity between surface patches. Is there a version of this tool or any technique to check seam continuity besides zebra stripes, curve maps, and visual cues? I’ve heard of something in v7 but what the move in v6?

EdgeContinuity in V7 WIP. To download and install the WIP see Rhino 7 WIP Available Now!

Nothing equivalent in V6.

The default rendered mode (no materials applied) with surface edges unchecked is pretty good for spotting problems.

I use EMap with the fluorescent tube enviorment map and also Zebra for checking continuity.