Do's and Don'ts

When modelling with polygonal objects, remember the followin guidelines:

• Model Solid Objects

  No facades

  It's easier to write other software if we can assume polygon faces are oriented

• No T-vertices

  These cause shading anomolies and pixel dropout

• No overlapping co-planar faces

  Violates solid object contraint.

  If different colours, then psychedelic effect due to floating point roundoff

• Well shaped polygon

  Equilateral triangle is best.

  Long, skinny triangles pose problems for numerical algorithms