cpu Posted February 21, 2006 Share Posted February 21, 2006 Curious, what exactly does the patch crack option (-c) do in mantra? Quote Link to comment Share on other sites More sharing options...
old school Posted February 21, 2006 Share Posted February 21, 2006 This is used by Mantra to automatically stitch up any holes that may exist in a rendered surface, mainly polygons. The main problem is "T" intersections between one polygon face and another when you apply displacements. If you pull up the middle "T" point, then the adjacent side needs to be split (coving) and the two points can now move in unison. All of these odd intersection junctions have to be resolved or else you get holes. I think of it as "stitching" adjacent sides together. The loose definition of coving means to make a bridging surface between two adjacent sides. Imagine the cove molding joining a wall to a ceiling called, coving. There are other meanings too but I think this one applies (like a crack or passage). Sometimes coving results in some very odd results that generally results in a hung render or very bizarre results in the image hence the option to turn it off. Here are the options for mantra: -c val Set coving options for dealing with patch cracks 0 = No coving of patch cracks 1 = Cove displaced and sub-division surfaces [default] 2 = Forced coving of all primitives Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.