Strange effect with a bsp

Hi,

I've noticed that when i walk through our bsp levels and looking from a specific place and angle we get strange 'ghost' walls. Any idea what may the cause of this?

With 'ghost' walls:
[img]http://www.interstudio.nl/temp/bsp_artifact1.jpg[/img]
Without:
[img]http://www.interstudio.nl/temp/bsp_artifact2.jpg[/img]

Thanks in advance.

Steven

You do not need any tags to show an image. Also, I cannot see from the screenshots what the problem is because they are too small.

If you mean it completely dissapears then it's probably a bug.

Maybe you are too close to the wall. If so, make your CameraRange smaller (if its currently 1,1000 then set it to 0.1,100) OR your collision sphere larger.

If you look at (the small) screenshots you'll see that one shows a very large grey polygon in the right in the of the viewport. This is what i call the 'ghost' wall. If i rotate around my axis on that specific place in the level it appears and disappears. It's not something we put into the level geometry.

Very mysterious.

It looks like part of the level is being hidden when it shouldn't be, this might be a bug with either Blitz or with the BSP file itself. Try removing that thin wall in front, that looks as if it could be confusing matters.

I have seen this "effect" or "bug" happen in commercial games.

my best guess for the moment is that we make not enough use of detail brushes and a bug in q2map2 (the bsp compiler). On the other hand the 'ghost' walls don't appear when cruising the levels using worldspin...