There is a few bugs I found when worked with jogl GPU FontRenderer 1. Q letter of arialbd font is overpainted 2. Some curves is abrupt (this can be seen with q and o chars) 3. Bold fonts (arialbd, timesbd) not displayed correctly. This is a link to demo source that shows all of these bugs: https://github.com/picoworm/TextRenderUtil_test
Closing with resolved Bug 1501 - Graph: Resolve Tessellation Bugs (Delaunay Triangulation)