VRay and Backburner

[CCS]

I was running render stripes yesterday when a question occurred to me: When using backburner, do VRay's settings still apply per image (as with DR) or do they apply per render stripe?

I realize precalcing a lighting solution would probably be the "right" way to do it, but if I have to precalc the entire frame, that kind of defeats the whole purpose of striping. Besides, I've never seen the slightest hint of banding in striped images.

If I render with DR, the entire light cache is calced before it distributes the scenes. I understand the reason for this. However, the same does not occur when I backburn a job. This leads me to believe that each stripe is being calced individually. If this is the case, and my light cache scale is set to screen, then are my 1000 subdivs spread across the entire image (as intended) or per stripe (since that is all that each server knows about)???

I suppose the same question would apply to irradiance map, qmc, and perhaps other settings.

[CCS]

Did I stump everyone or is this just a stupid question? Assuming the latter.

Bottom line: Do I need to adjust my vray settings when rendering stripes?

[digitarch]

rendertimes and quality assume that the renderslaves seem to use the lightcache-subdivs only for there "own" stripe, as it is ment to be an resolution-independend quality-setting.
as the irrad-settings rely on imagesize, they work fine with stripes.

are your stripes rendered in the correct size? our stripes are bigger than the settings, causing much to high rendertimes (but they´re correctly stitched).

matthias

[CCS]

I'll ask a followup just to clarify. (Your answer was probably fine, but I'm a bit thick and incredinly tired.)

For an example:
If I submit an IR+LC job to backburner, are you saying the IR settings should be the same as normal, but the LC settings will be applied on a "per stripe" basis? i.e. - 1500 subdivs would be spread across each stripe rather than 1500 for the final image (as it would be without backburner)

Am I making sense?