I must have zoomed out too far, turned the camera in the wrong direction, whatever. The model is lost, I cannot find it in the 3D View. This is a complex project and I don't want to start over. I have tried orthographic view and all known keyboard shortcuts. But I am still lost in the void and I can't find my 3D Model. I'm about to plant a bomb at Substance Painter HQ or at least give them a phone call wishing death on them all.