[Bug]: office_painting01 and office_painting02 disappear consistently while still on screen (and how to fix it)

[Sae35]

Describe the bug.

An issue is present on every single map that has either of the office painting models (office_painting01 and office_painting02) is that they disappear while still being on screen. While not making the game unplayable, it still is an issue that seems unique to these models in particular.

Version

rev21

What server did this occur on?

Local server (can happen on any server).

Reproduction steps

1. Go to a map with either the office_painting01 or office_painting02 model on it.
2. Locate where said model is.
3. Move your camera around to notice how it disappears while still on screen.

Which operating systems have you used?

Windows

Expected behavior

The paintings should remain visible as long as they're on screen.

Relevant log output

Additional context

To fix this, go to the .qc files of both models and remove the lines that start with "$BBox".
From how they behave in game, it seems like there are manually set ones for these models in particular instead of the auto generated ones that typically are generated when you compile a model.

(Had to compress the video a bit to fit under the limit, but here is what the original looks like compared to the fixed versions.)

Painting.Issue.Compressed.mp4

[ktwrd]

Seems like it could be another sideaffect of high FOV? iirc there are some bugs w/ skyboxes when you have a high FOV in source, but that's patched in sdk13-gigalib.

@Sae35 Can you reproduce with any other models that have a similar size? And can you reproduce this at a lower FOV?

[Sae35]

The issue happens regardless of FOV.
I tested this with the default FOV of 90 and the lowest FOV of 65, both still produced the same issue (shown below).

Painting.Issue.FOV.90.mp4

Painting.Issue.FOV.65.mp4

As for other models, I have never seen the same issue with other models regardless of my FOV. I did a sanity check and ran around various maps looking for the similar issue on different FOVs and I could not replicate it. (I can't really upload a video of me doing this due to upload limits, but I can assure you that I did.)

[SeroRonin]

Likely an issue with one of the bounding boxes set on these models. Most likely cause is if the QC was copied from another model and the bbox was not adjusted, it probably has the size of whatever model it was copied from.