Thanks for the reply.

I thought the near clippling plane might have been the problem but its
not clipping the terrain adjacent to the points.

It also makes me wonder why this would only happen if the terrain is
visible.

I've set my near clipping plane to .1 and the far to 1000.
The camera I'm using is the default one created by the viewer. 

double fovY, aspectRatio, near, far;
mcam->getProjectionMatrixAsPerspective(fovY, aspectRatio, near, far);
mcam->setProjectionMatrixAsPerspective(fovY, aspectRatio, .1, 1000);

mcam
->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
mcam ->setCullingMode(osg::CullSettings::NO_CULLING);

Even with these settings the problem still occurs.

Any other Ideas?
 
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Robert
Osfield
Sent: Thursday, April 24, 2008 11:25 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] Point cloud culling/paging

On Thu, Apr 24, 2008 at 4:22 PM, Robert Osfield
<[EMAIL PROTECTED]> wrote:
> HI Steve,
>
>  It's much more likely that near plane clipping is at fault than
>  culling, unless your bounding volume for the point clouds is not
>  correct.

I should clarify, when I said "near plane clipping is at fault" I
didn't mean to imply that it might be a bug lurking, but that even
normal near plane clipping by can result in parts of the scene looking
like they are being culled.  The near and far planes are totally under
your control so if you want you can set them explictly to what you
want.  So rather than a bug is just an aspect of OpenGL/OSG rendering
that one has to be aware of and mange accoridingly.

Robert.
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