Some questions concerning render times.

[Msamir]

I have a couple of questions and I thought someone might help me understand.

 

1)Why does the render time increase when I use omni lights ?

 

2)Which render faster the vray lights or the standard max lights ?

 

Thanks in advance.

[Tim Saunders]

I have never had great success using omni lights in vray. Vray lights are built for vray specifically, so use them whenever possible. That doesn't mean standard lights don't work well. For instance, I almost always use a standard direct light for a sun, a standard spotlight for canned lights, and photometrics with IES data when I want a little more "punch" to my wall washing effects. But Omnis are rarely used for any of those purposes, so use a Vray sphere in the situations where you think you might use an omni.

 

PS.

Always use Vray shadows.

[MegaPixel]

Another tip for using standard lights with Vray is to make sure they have some kind of decay (Inverse or Inverse Square) and NOT None. Leaving the decay to none just creates lots of extra ray casting that goes no where but adds to the render time. Typically, you can get away with this slopiness with your sun source, but take a little more care in optimizing you interior light influences - good house keeping.

[Brian Smith]

I have never had great success using omni lights in vray. Vray lights are built for vray specifically, so use them whenever possible. That doesn't mean standard lights don't work well. For instance, I almost always use a standard direct light for a sun, a standard spotlight for canned lights, and photometrics with IES data when I want a little more "punch" to my wall washing effects. But Omnis are rarely used for any of those purposes, so use a Vray sphere in the situations where you think you might use an omni.

 

PS.

Always use Vray shadows.

 

Ditto word for word.

[Msamir]

@Timothy: Thanks for the info., I was working on an image where I added just 2 omni lights and 1-2 hours were added to the render time so it seems I wont be using omni lights anymore.

 

@MegaPixel:Thanks allot for this tip, I've always left the decay to none which may explain my high render times.