Errm,

I know it works in other apps. How about that offer of the code sample so I can see why it doesn''t work in mine.

Tony

Problem bl**dy solved!!

Right then. After reading the documentation and applying common sense I assumed the following process.

1) Initialise
2) Render Loop
3) Clear Z-Buffer
4) Render Object
5) Get Next Object
6) Goto 2 until no more objects
7) Flip surface

What I actually needed to do was:
1) Initialise
2) Clear Z-Buffer
3) Render Loop
4) Render Object
5) Clear Z-Buffer
6) Get Next Object
7) Goto 3 until no more objects
8) Flip surface.

Why you need to clear the Z-buffer before flipping is just a mystery to me. Expecially when the Z-buffer is turned off!!!





Tony

Thanks for the reply,

However, I don''t see how the requirement to clear the z-buffer after the final render and before the flip has any effect on near plane precision problems. A very import and strange point is that I would have the problems with the z/w-buffer switched off and the also with the w-buffer switched on.

If you are not convinced by that, I also reduced my projection matrix planes from 0.1-10,0000 to 1-300 to make remove any doubt about z precision.

Now that I do clear the z/w-buffer after the last render and before the flip I get a perfect render.

It looks bootiful!

Tony.

Tony