Problems encountered 1. Most of my problems were with using polygons subdivision and sub patching (Lightwave version 7 extension to meta-nurbs). Often, after subdividing adjacent polygons using Construct->Add Points and Construct->split, the target polygon had been split but another edge had been created so the polygon I was splitting no longer shared an edge with the adjacent polygon. I read the manual and it said to make sure and select all polygons sharing edges that points were added to for splitting, but even when I did that I often had problems. I solved them by deleting the polygons and then selecting the points and recreating the polygon (Create->make pol).
2. After applying sub patching (tab key) there would be defects in the surface. I tried to discover some regularity to the cause, e.g., co-planar polygons, and that sometimes solved the problem but not always. Often I just had to play with the polygons, subdividing, deleting, recreating, etc. to solve the problem.
3. I often had to subdivide a polygon to correct a defect (2 above) which caused other polygons to have be subdivided, other wise they would have too many sides and probably become co-planar. I spent a lot of time trying to figure out how to do the subdivision in order to have a minimal effect on other polygons. Sometimes this caused even more defects in the results of sub patching. The solution was the same as 2 above.
4. Subdividing polygons and moving points to make the head and body usually caused co-planar polygons, some with more than 4 points. I found the Lightwave Modeler statistics window to be of great help with this. It lists polygons by categories according to the number of points. It also lists the number of co-planar polygons. When one of these categories is selected in the statistics window, Lightwave selects all the polygons in that category. I did this to the co-planar category, then tripled the selected polygons thus solving the problem.
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