disappearing models

[something]

i have created some entities for use as environment decoration.

that seem to disappear when at the edges of the screen or when viewed from certain angles/positions.

below is a screenshot showing what it should look like.


and a few steps forward and it disappears.


**the red is the entity bbox
i am using darkplaces

i thought i had fixed it. but the problem has come up again.


has anybody experienced this.

[ceriux]

pics are too tiny, try imageshack or photobucket

[something]

[frag.machine]

[Teiman]

[something]

[st3ady]

i haven't inspected the pics or the video but it could be that there are 2 or more triangles in the model that are in the same locations, which can cause wierd things to happen. Be sure to inspect the model in a modeling program like max and make sure there arent multiple vertices and faces overlapping. If it is brush work, then check in the mapping program.

good luck

[something]

[frag.machine]

AFAIK bad model geometry wold result in tris flickering/disappearing, not the whole model. Looks like the engine sometimes miscalculates the entity size and then remove it from the PVS.

[mh]

As a test you could try loading the map in a different engine and see if the problem occurs there. DirectQ has a handy sv_novis cvar which you can set to 1 to cause the server to send all entities to the client irrespective of whether they're in the PVS. Run it as a listen server and connect a DP client and you should then get a very good feel for whether the problem is a client-side or server-side one, as well as whether it's a DP bug or a model bug (or even an inherited GLQuake bug, although I would doubt that with DP as it's code is so different).