This isn’t a lot to go on. Can you post up a screen capture of what you’re seeing?
Match Photo initially opens up in the ‘edit perspective mode’,… where the goal is to adjust the perspective grid to align with the perspective that’s shown on the imported ‘matched photo’.
SU needs to determine where the vantage point is (viewing position), relative to the vanishing points that are positioned during the perspective grid alignment. All that’s really happening here is that SU is trying to align it’s internal coordinate system to what’s being shown in the imported image… And it’s all being determined by how the vanishing points are being aligned in the edit perspective mode.
I’m just trying to outline a basic understanding here, you don’t need to know a lot about perspective to use SU Matched Photo tools.
What’s essential to understand however, is that there’s two modes here… the edit perspective mode, and the drawing mode. and sometimes getting back and forth between the two can be confusing.
I’m not sure what your looking at, and it would be more clear if you can post up a screen capture of what you’re seeing.
General Trouble Shooting for missing models:
Change what’s within view, by using the Zoom Extents command… press ‘Shift’ + ‘Z’.
Turn on the View Hidden Geometry setting… >View >Hidden Geometry
Within the Model Info panel look at the ‘Statistics’ field, to see what the basic geometry count is. That should give some indication of what geometry is present within the model.
Make sure that you’ve been drawing on Layer 0, and if not, then double check that you haven’t been drawing on a layer that’s been turned OFF.