irradiance animation(rendering) too slow

[khoross]

hi everyone .

im doing an interior animation of a villa nothng much just a few furniture & some doors that opens.

first i did the animation using irradiance map incremental add . everything was good except some splotches when the doors open, & the frame was rendering in average of 3 min .

for some reason i wanted to try the animation (prepass)(rendering) so i would get more quality when the animated doors opens,

the prepass phase went quite nice , but when rendering in animation(rendering) each frame is taking from 7 to 12 min ok the quality is better but not noticeable .

is it natural to take this long to render a frame .?????

thx for u reply

[Paul Oblomov]

As I understand - animation mode just interpolates several frames back and forth, to get rid of splotches in this particular frame. This tells me that some cpu hungry work was done to achieve this

[khoross]

I was expecting an increase of time by frame using this methode ,
but not x4 per frame, i would have used Lc & brute force instead

What's bothering me is that my pc seems to be using alot of rams
In this method , I can't even open my browzer or the task manager,
the hole pc hangs while the buckets are still.
I will post a preview of my scene, and maybe try to render it
LC & QMC see what rendertimes I'll get.

[Neilg]

After a lengthy bout of testing, I found that single frame irradiance maps set to high - 80,60 was faster than medium on animation mode, 50, 25.

And it looked better.

From what I gather the second number/calculations in your GI settings is handled at render time, and if it's interpolating over 3 it has to do that calculation 7 times. Just a guess, from vague things i've heard.

I'd wager it's more useful for close up animations/lots of motion without much memory use. For a room which is mostly static and uses a lot of memory it seems to slow it down.
Vray sphere fade is an option, or editing - render 2 versions either side of the animated piece, one with door and one without then render the 50| frame section as it moves on a really high preset.