3dcheapskate opened this issue on Dec 18, 2014 · 11 posts
3dcheapskate posted Sat, 20 December 2014 at 12:12 AM
I've had this happen numerous times but I've yet to figure out a consistent way to beat it. the only solution which seems to work - some of the time - is to use a much higher res mesh for the ground. I couldn't give you a figure for that, unfortunately; you'll just have to faff about.
I'm still chipping away at this little conundrum. Your "using a higher resolution mesh" seems to tie in with the results I'm seeing - I'd really like to nail this one down by coming up with some figures! I think it's worth summarizing my thoughts so far.
I'm fairly sure there are two distinct (although probably related) problems, which likely occur under a broader range of conditions than I state here (I assume that you're using more 'normal' FOV values when you see this? I don't think many people use a 90° FOV?):
1)The bottom edge of a 1-face/4-vertex groundplane being 'clipped' in a 90° FOV horizontal (N, S, E, or W-facing) render. My thoughts so far (for which I'm still doing more tests) are that this seems to occur when the face exceeds a certain size - increasing the scale definitely causes it, but I'm not sure yet whether increasing the size of the square's actual geometry does.
Also it can be only part of a face that's clipped (i.e. when using a 1-face/4-vertex groundplane).
When using a multi-face mesh it appears to be only the closeset face(s) in the right hand side of the West render that get clipped.
When using a multi-face mesh it seems to occur when the mesh/faces exceed a certain size - increasing the scale definitely causes it, but I'm not sure yet whether increasing the size of the square's actual geometry does.
(I get a very vague idea that there could be an error in the maths with one of the circular functions, under very specific circumstances - but that's just grabbing at straws! )
Like I already said there's more tests to try.
The 3Dcheapskate (also available in DAZ and HiveWire3D flavours) occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.