Converting LDraw parts to WPF

[Hans de Lang]

Did you remember to invert the drawing order for rotations with negative determinants?

(ie. Reverse the CCW drawing order if determinant(rotation) < 0)

If this is the issue, then I recommend adding this tip to the Culling/clipping page as everyone (including myself twice) have fallen into this.

Excellent! That's the trick, now I can see both discs at the top and at the bottom.

Thanks!