Vray Interior Problems with Irradiance Map

[martin walker]

Guys, working on a small animation in my spare time, but Im having the same old problems with my Irradiance map settings and/or Light Cache settings. Ive attached a still and the settings Im using

 

Any help would be greatly appreciated

 

ta

[kippu]

everything looks good ... what are your rqmc sampler values?

[Ricardo Eloy]

I'm not sure everything is fine. Try using the IrrMap preset for animation instead of the simple High one. Also, maybe your LC subdivs could be left as 1000 (default). I'm assuming you already calculated the LC map for the animation, right?

[martin walker]

Thanks...will try that. I even used the "enhance detail" setting...which is painfully slow

 

am I correct in assuming that if I calculate the Light Cache with a low setting (say 100).....it doesnt matter how high I bang up the Irradiance Map it will still have too little GI info and be noisy grainy ?

[Ricardo Eloy]

Yes, Detail Enhancement is very slow. It's kind of AO, so you don't really need to use it (imo).

The thing with LC is that with very low settings it's almost like not using it at all. Personally, I hardly touch the default settings, even for animations. I probably could get faster calcs, but the default works most times, so...

[martin walker]

Rick, thanks for the advice

 

I tried bumping my LC settings upto a 1000 only to get a crash (which I always seem to get on more complex scenes) Im running a dual xeon, 3 gig of ram and 3gb switch enabled

 

any ideas ?

[Ricardo Eloy]

You got a crash with 1000? On a dual xeon with 3 gig? You gotta be kiddin'! How many polys are you dealing with? I usually set LC to 1250 and 0.01 (screen) and it runs just fine on my P4 3.4 with only 1 gig... What's the resolution you're trying to render? There's something weird there, I guess...

[alfienoakes]

I usually, by default now, use 1250 as a default.

 

Do you have any large objects, which could cause your "world" to be very expansive..? I can get mine to crash if I try to hike LC sub's too high with world, and then mix that with a large object in. Something that would effectively give you a huge object, like a base to the model.

 

Andy

[Ricardo Eloy]

Andy, you hit a spot I had forgoten, there. Using the LC scale set to world if best for animations, but it's really memory consuming. That might be it.

[martin walker]

I usually, by default now, use 1250 as a default.

 

Do you have any large objects, which could cause your "world" to be very expansive..? I can get mine to crash if I try to hike LC sub's too high with world, and then mix that with a large object in. Something that would effectively give you a huge object, like a base to the model.

 

Andy

 

 

thanks Andy, Ive had a look and nothing very big. Could my sample size be too small (0.01m) Im working in proper scale / units ????

 

Im sure now the blotchinees is down to my LC settings...just trying the thing to calcualte without falling over...grrrr

[alfienoakes]

Well, 0.01 of a metre is 10mm.. thats quite tight.. I would try changing it to 50mm, 0.05, and chnage the sub divs to 1250.. Give that a go..

 

Andy