Just a thougth...are sphereLights slower than rectLights?

[ultrasonic]

I am just lighting a scene using sphere lights with radius of 25 (10 segments)...since it would not really make a difference i could also use a rectLight with aproximately the same size...
now the question: Would a rectlight (with same subdivs) be faster to render?

thx in advance
Oliver

[vlado]

I don't think there will be much of a difference, but it would be best to test how that works for your particular case.

Best regards,
Vladlo

[aweidenhammer]

Wouldn't the sphere light be wasting a lot of samples in places you don't need them? I suppose the importance sampling bit in vray should take care of that, but I still generally try not to use a sphere light where a plane or spot will suffice.

Would be curious to know.

Andrew

[instinct]

Well i would guess it would be the same speed, but look more noisy with the same amount of subdivs no ? On top it might of course cause more AA samples to be taken due to the higher noise.

Regards,
Thorsten

[vlado]

Well i would guess it would be the same speed, but look more noisy with the same amount of subdivs no?

I don't think there will be much difference in the noise levels...

Best regards,
Vlado

[ultrasonic]

Hey guys,
in my particular case the rendertime did not drop dramaticaly...it went from 65 minutes down to 60 minutes but it seemed a very little more noisy (fur rendering)...so i think it doesn't matter whether we use sphere or rect lights...