Light cache subdivs multiplier mode

[LudvikKoutny]

Hello,

i think many people including me have adapted the practice of setting LC subdiv value based on the resolution of rendering output. Usually, i tend to set LC subdivs value close to the pixel value of longer side of my output. So for example 1200 subdivs for 1280*720 output.

The annoyance there is that i often switch resolutions when doing low/med/high quality previews, and i always have to keep LC value in my attention when changing resolution and change it too.

So my proposal is that LC subdivs value would have two modes - relative, and absolute. Absolute mode would be same as it is now, and relative mode would switch the value to be a multiplier of the longer side of the output.

So for example multiplier of 1 would set subdivs to 1920 for 1920*1080 output, multiplier of 0,5 would set subdivs to 960, and so on.

It would then be easy to set desired quality level of LC map that would be consistent when output resolution changes.

Thanks in advance.

[sandykoufax]

hehe, interesting idea.
But don't be too lazy. :P
Too many option is not always good.

[vlado]

Is there a reason why you want to do that? I would understand changing the sample size based on the resolution, but the subdivs, I'm not sure. In the example page for the light cache subdivs I specifically show that resolution has no effect whatsoever on the resulting light cache using the same subdivs:
http://www.spot3d.com/vray/help/200R...tcache.htm#ex3

Best regards,
Vlado

[LudvikKoutny]

Nevemind then... I will have to rethink the way i am using Light Cache... I am still a little bit confused about it, as i expect every interpolated GI technique to be controlled by 3 major parameters:

Sample quality
Sample density
Sample interpolation strength

With LC it's strange, as subdivs sets overall quality of the solution rather than quality of individual samples.

[zeronove]

...changing the sample size based on the resolution...

what do you mean?
LC in screen mode is not enough too tie sample size and resolution together?

[LudvikKoutny]

what do you mean?
LC in screen mode is not enough too tie sample size and resolution together?

Yes, as already i stated, i misunderstood the mechanics of Light Cache, so nevermind that.

[vlado]

With LC it's strange, as subdivs sets overall quality of the solution rather than quality of individual samples.

It's because it's not exactly like other GI interpolation techniques In some ways it's more similar to radiosity methods.

Best regards,
Vlado

[LudvikKoutny]

It's because it's not exactly like other GI interpolation techniques In some ways it's more similar to radiosity methods.

Best regards,
Vlado

Thanks, this gives me a clue on how to approach LC setup now