rerun119 idk how it works exactly, but on DeoVR Horizontal offset fixes the horizontal scale, and Vertical offset fixes the vertical scale. I don't think it has anything to do with tilt or positioning
They're a must for the new passthrough scenes since the scale is always off and zoom alone doesn't fix that. When the girl looks too small, I set both to +1.0. The scale on regular VR scenes is usually off too, but it's harder to notice since I don't have a real world reference