Daemon Material system: can see through walls on plat23

On plat23 there is an unphysical situation, where some rooms are supposed to be covered by the skybox. unvanquished_2024-08-18_221135_000

Aug 19 '24 03:08 slipher

Apparently it just depends on PVS not to draw this. Setting r_novis you can see it without using the material system. Maybe this should be considered a map bug

Sep 13 '24 17:09 slipher

Apparently it just depends on PVS not to draw this. Setting r_novis you can see it without using the material system. Maybe this should be considered a map bug

I don't think it's a map bug so much as just how BSP works. I assume sky brushes are just treated the same as solid surfaces for the purposes of BSP.

I have a fix for this issue in mind, should be pretty simple.

Sep 13 '24 18:09 VReaperV

Apparently it just depends on PVS not to draw this. Setting r_novis you can see it without using the material system. Maybe this should be considered a map bug

I don't think it's a map bug so much as just how BSP works. I assume sky brushes are just treated the same as solid surfaces for the purposes of BSP.

I have a fix for this issue in mind, should be pretty simple.

I changed my mind - it is a map bug. The map as it currently is displays some sort of non-euclidean space when using the BSP.

Sep 07 '25 16:09 VReaperV

There's a great number of maps like this so it would be nice to support the vis somehow. Many of them have the bug even with the default renderer though. In a lot of cases there is a huge amount of stuff that you can see with novis/material system, while when using vis, there is still a little bit of stuff you can see from a certain spot. For example https://github.com/UnvanquishedAssets/map-parpax_src.dpkdir/issues/19.

It would be nice to understand how this stuff is actually intended to work from a mapping perspective. Does q3map2 really treat the skybox as opaque when calculating vis?

Sep 07 '25 17:09 slipher