Iray noise ??

[gabrielefx]

relative small windows...
architects can't render rooms with small windows in iray....
come on...it's an issue...

[hoppergrass]

No it not the small windows thats the problem , rather is ineffcient to light a scene with small windows only with exterior illumination. ie not enough samples can get into the space compared to those outside. You need to think of a way to get more samples inside than outside.

jhv

[Remydrh]

Uni-directional path tracers (ALL uni-directional) have a hard time with small light source openings. So this isn't related to just iray. (Future versions of iray are slated to incorporate bi-directional path tracing, see the nvidia talks at SIGGRAPH)

In theory, the portal light compatibility was designed for this type of scenario but it's usefulness is related to how small your openings are. If they are decently large then portals will hurt, not help. But worth a try maybe?

[maxt]

You need to think of a way to get more samples inside than outside.
jhv

you mean, instead to dev support for those silly light portals, ain't it ? because .. they just contradict the whole philosophy behind this kind of rendereres .. eg. the day before, .. - nope iray is fully un-biased, zero-parameters renderer, one-click-button solution, and the they after .. uh, well .. you may try to consider using light portals for that kind of specific scene, ... - and oh yeah, about that smart noise patterns all over the image? .. well just use post noise removal filter .. god.. do it right at least with iray (enhance technologies, instead to patch'em ..) !

cheers

[sherridge101]

Is the checker pattern issue separate to the overall noise sampling?

I'm having some issues with the checker pattern in shadow areas.

[Remydrh]

nope iray is fully un-biased, zero-parameters renderer, one-click-button solution, and the they after .. uh, well .. you may try to consider using light portals for that kind of specific scene,

. . .to my knowledge the inclusion of the portal lights was an Autodesk request. . . .

[sherridge101]

Here's a screen grab.

The noise is filtering out nicely, but the checker pattern is clear.

This is mainly in the reflected areas on this shot.

Any tips on reducing this?

Cheers,

Steve

[sherridge101]

The checker pattern is now refining out to a smaller checker pattern.

For our tests, this would be usable with a small amount of blurring.

[maxt]

. . .to my knowledge the inclusion of the portal lights was an Autodesk request. . . .

I was just kidding about the naive fact that there's this main trend nowadays, kinda like a uber-virtue .... , - the zero-parameter or one-click renderer solutions. never seen one, in facts, you may start with zero-param and then of course simply keep adding everything needed or requested

Is that in the while, nobody seems able to introduce a simple distiction about 'parameters' , there're parameters that pretty works because the underlying tech works, and parameter that do not, coz the underlying stuff is inconsistent as main approach, so that's not a matter about zero-parameters or whatever but just about the tech you use.

if in iray you have less params and those you have does even make practical sense, that's just a better tech than the one which uses obscure sutff, if we start adding stuff that does not make direct sense like having to put a big squared light in front of a window, then also the underlying tech is a bit inconsistent. same may goes for noise filters that historically created always more problems than those were trying to address.