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* 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 or something else.
*soon only to be available in two flavours - DAZ and Renderosity