Thanks for reporting this — it was a bug in the automatic camera selection logic. Vertex Screen Snapping should use a selected camera, the active scene camera, or the only camera in the scene. This has been fixed in version 1.7.9
Hello, I'm using Blender 5.2 with PSX Retro Tools 1.7.10.
It seems that Pixel Perfect doesn't match the output resolution. I'm using a resolution of 360 × 640 with 3× upscaling, but the output is still 720 × 1280 instead of the expected 1080 × 1920.
(I was going to upload a screenshot, but for some reason it isn't working.)