ZDoom

To be honest your description of the problem has almost no useful information.

[quote="Formic.Sapien"]Here's a pk3 where I've replaced the Guantlets. They show up fine: [url]https://drive.google.com/open?id=1WuhS3WvrwuzaU2ke44hb4pOGI6drRPXm[/url][/quote]
The given .pk3 has incorrect directory structure. The should be no [b]HereticVRWeapons - Copy[/b] folder and all files must be placed in the root of the archive.

[quote="Formic.Sapien"]Now, when I try to add models to the MODELDEF file, the game complains that there are multiple models defined, and doesn't load.[/quote]
Post complete and up-to-date sample that exhibits the issue. Guess game doesn't work here.

Background:
Following up on Biospud's VR port, reddit user u/Fish_Biter added tracked motion controller support which really brings the port into an enjoyable & playable state. I'm a modeler, and I ported the Voxel weapons for vanilla Doom/Doom II weapons, and they work awesome. I was able to get animations by using the ol' MODELDEF (< which I still don't understand 100%). I'm now moving on to getting Voxel weapons up and working for Heretic, but I can't get animations to work.

Here's a pk3 where I've replaced the Guantlets. They show up fine: [url]https://drive.google.com/open?id=1WuhS3WvrwuzaU2ke44hb4pOGI6drRPXm[/url]

Now, when I try to add models to the MODELDEF file, the game complains that there are multiple models defined, and doesn't load.