Exit Portals Question
- pixie
- Posts: 2332
- Joined: Sat Dec 29, 2007 4:54 am
- Location: Away from paradise
- 3D Software: Cinema 4D
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Exit Portals Question
I've been trying to use some Exit Portals to see if I can cut in times yet to no avail. I put them as it should, with normals corrected, z axis inwards still I have less samples then without, something I wasn't expecting. Anyone knows why? I though that anytime they would make the render go faster.
if you change between BiDir and no BiDir, it doesn't really count the same.
BiDir will always have a lower sampling count, although the image overally already has less noise.
I guess, same happens, when using Exit Portals.
Just make sure, they're as small and as simple as possible. If you simply make a big cube around the scene, it wont be faster at all. Just cover all the openings with the simplest meshes, you're able to (usually a single quad, as most openings have that shape) and as shape matching as you can.
Also put it as close to the wall as possible. Slight intersecting shouldn't harm, in this case
BiDir will always have a lower sampling count, although the image overally already has less noise.
I guess, same happens, when using Exit Portals.
Just make sure, they're as small and as simple as possible. If you simply make a big cube around the scene, it wont be faster at all. Just cover all the openings with the simplest meshes, you're able to (usually a single quad, as most openings have that shape) and as shape matching as you can.
Also put it as close to the wall as possible. Slight intersecting shouldn't harm, in this case
- pixie
- Posts: 2332
- Joined: Sat Dec 29, 2007 4:54 am
- Location: Away from paradise
- 3D Software: Cinema 4D
- Contact:
I attach a scene akin to that giving the problem, and which the 'problem' still remains.
Whenever I do Exit Portals I do like this, close the last further hole where light might come in, otherwise I don't do it at all(if for example something interesting is outside the window).
The ratio is:
with: 3436
without: 9582
Whenever I do Exit Portals I do like this, close the last further hole where light might come in, otherwise I don't do it at all(if for example something interesting is outside the window).
The ratio is:
with: 3436
without: 9582
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