Using max ray intensity

[stevesideas]

Should I have sub pixel mapping off now if I use max ray intensity ? Also, does having sub pixel mapping on speed up renders in general ?

[Svetlozar Draganov]

It is not necessary to turn off subpixxel mapping in order to use Max Ray Intensity.
In most of the cases when subpixel mapping is on the render times are higher not lower - please note that the result is more accurate when this option is off.

[stevesideas]

ok thanks for the confirmation.

[Morne]

It is not necessary to turn off subpixxel mapping in order to use Max Ray Intensity.
In most of the cases when subpixel mapping is on the render times are higher not lower - please note that the result is more accurate when this option is off.

OK but what about Max ray intensity?

Is times lower or higher just with that (if subpixel is off)?

[Svetlozar Draganov]

The times should be lower with lower values for Max Ray Intensity.

[Morne]

The times should be lower with lower values for Max Ray Intensity.

default is 20
can I set it to 5 maybe?
or even 2?

[Vizioen]

OK but what about Max ray intensity?

Is times lower or higher just with that (if subpixel is off)?

Don't know if this is a good scene to test, but even with this simple one. Vrayplane, with sphere and planelight, it's a few seconds faster. With no quality difference.

WITH


WITHOUT


edit: defaults at 20

On a side note, what does the primitives value in the stamp stand for, I can see it has different numbers, but the only thing different between the two renders is the max ray intensity.

[Morne]

Don't know if this is a good scene to test, but even with this simple one. Vrayplane, with sphere and planelight, it's a few seconds faster. With no quality difference.

WITH
[ATTACH=CONFIG]21359[/ATTACH]

WITHOUT
[ATTACH=CONFIG]21360[/ATTACH]

edit: defaults at 20

On a side note, what does the primitives value in the stamp stand for, I can see it has different numbers, but the only thing different between the two renders is the max ray intensity.

Could you test it with MRI of 5 please?

[Vizioen]

Could you test it with MRI of 5 please?

As expected it's a tad slower, clocked in at 37.6 secs, no quality differences.

[cheerioboy]

the number of primitives changes?

[Vizioen]

the number of primitives changes?

Yes indeed with MRI it changes. Don't know why either.

[Svetlozar Draganov]

Yes indeed with MRI it changes. Don't know why either.

The number of primitives value sometimes is not updated properly in VFB stamp.
Check that value in V-Ray log window - the number there should stay the same regardless MRI value.



This bug happens sometimes even without changing anything in the scene - try to render the scene a few subsequent times without any change and you'll notices that the number will change from its real value to something like 840 or 850 ect.

I'll make note about it into our system.

[Vizioen]

It is indeed not changing in the Message window.