Seen this a lot. "Hairline cracks" Make sure your vertices are welded. Unfort. using an other CLS color doesn't seem to fix it IIRC.
A rounding error problem with DirectX. It may or may not help if you alter the quality/speed settings of your card.

Tho, strange, my dots are black on white, yours white on black. It's a conspiracy to drive us insane.
A rounding error problem with DirectX. It may or may not help if you alter the quality/speed settings of your card.

Tho, strange, my dots are black on white, yours white on black. It's a conspiracy to drive us insane.