/vr/ - Retro Games

>>4696847
A demo is basically a recording of a player's actions that can be run in Doom itself to watch someone play, like a video. What makes demos better than videos is that they're really easy to make and extremely small files, so you can easily download and store tons of them. The problem with demos is that they're just collections of button presses, so if the game that the demo is being watched on is different in literally any way from how the game was when it was recorded, the demo will desync and will be useless. GZDoom is mostly worthless for demos because how it interprets Doom is so radically different from Vanilla or any other source port that it can only read GZDoom demo files, and even those won't have sync in between version updates.

What they're saying is that PRBoom is the best at making and watching demos because it has more flexibility and customization than Chocolate Doom, but it's still close enough to Vanilla that those demos won't desync. Thus, it can not only read Chocolate and Vanilla Doom demos, but you can easily make demos with different variables that neither ChocDoom nor VanDoom will allow that can be guaranteed watchable by anyone else with PRBoom.