Page 1 of 1
[REQ] Subdivision primitive?
Posted: Sat Apr 12, 2008 9:51 am
by pixelminer
Just wondering if this might be a feature consideration for the future. Leaving it up to the 3D package to subdivide before exporting the mesh is fine but this seems to generate huge .igs files which eat up A LOT of disk space.
A test render I did with 28 monkey heads with subdivision at render time set to 3 generated a 188MB .igs file for each frame?!?!?
phong.[/img]
Posted: Mon Apr 14, 2008 7:10 am
by Kram1032
Was this really just a test or would it be possible to instance stuff in the render, you originally need(ed) this for?
Subdivision Primitive ~ MPD which Ono definitely'll add but noone, afaik not even himself, knows when.
Posted: Mon Apr 14, 2008 10:40 am
by pixelminer
I intentionally didn't use instances because I wanted to know how much actual geometry Indigo could handle. My original test had like a 100 but I cut back down to 28 until the exporter didn't crash. :p
phong.
Posted: Wed Apr 16, 2008 1:58 am
by Kram1032
Ok. I see...
500*~4^3*28~=896000 faces. Hum, I'm pretty sure that either my formula is wrong or you haven't got enough RAM, as that shouldn't really be a problem to handle...
Posted: Wed Apr 16, 2008 4:51 am
by pixelminer
Kram1032 wrote:Ok. I see...
500*~4^3*28~=896000 faces. Hum, I'm pretty sure that either my formula is wrong or you haven't got enough RAM, as that shouldn't really be a problem to handle...
Not 500. Each monkey has a render subdivision setting of 3. I don't know how many polygons that makes but it definitely wasn't 500 each.
phong.
Posted: Wed Apr 16, 2008 7:21 am
by alex22
its polys*4^number of iterations
Posted: Sat Apr 19, 2008 1:30 am
by Kram1032
AFAIK, one suzanne has exactly 500 faces, though the calculation isn't perfectly correct, as it has a few tris, aswell, and those only get subd'd in three quads instead of 4.
the *28 was from the 28 not-instanced suzannes...
Edit: strange, I get completely different values...
125 952 faces per suzanne... far off...
so, it actually should be
3 526 656 faces...