So it is faster, but the through camera projection doesn't match the scene, I don't know what to do about that. I'm not too familiar with the through camera projection, but to my assumptions it should match the scene if the camera isn't touched. Huh.
The outputs are as to be expected, specular, and reflection, and could be easily composited onto a PT render if need be on a reflection-less muddy ground. As for in TG itself from these images, not sure why they don't match up.
Add ref images, note the layer elements are from EXR so way brighter than they should be as JPEG.
If we could get help on why projection is wrong, this could really help. The Standard reflections take an hour, PT take 4 hours, and look almost the same for flat ground. And the compiled PT with projection only takes 12 minutes.... soo yeah, huge savings. But the alignment issue...