Loading...
> >

Computer Renders at Different Speeds?

DekeDeke Posts: 1,635
edited January 2016 in New Users

I'm using daz 4.8 and rendering in Iray. I have a older Mac Pro Tower with two geforce 680 graphics cards in it. So this baby can crunch. Oddly enough on some days it will render a shot and make a racket as though fans are churning...then the next day...rendering the exact same shot...and it's quiet as a mouse.  And the shots aren't rendering as fast. I will set a animation sequence to render for a max of 60 seconds per frame on day one that results in well-resolved frames. On day two I get sandpaper. The panel says both cards and CPU are checked. Is my computer just feeling lazy?

Post edited by Deke on

Comments

  • fred9803fred9803 Posts: 1,564

    I'm also convinced that an idetical scene will not render as quickly for no apparent reason. The sandpaper of course is due to the time limit you enforced per frame, but evidence of this fact. I've had some scenes taking nearly twice as long to render after minor adjustments such as moving a small object a few inches. Whether this is a DS issue or a hardware/memory issue I really don't know.

  • JohannaJohanna Posts: 119

    Its the magic of rays that are wandering through the virtual world.

    The actual state of your HD, SSD, ram and vram also can cause different render speeds. Fragmentation and stuff.

    I recommend (and always do) a restart of the computer up front every render session.

    You know the butterfly effect? One move of the small wings can cause a big storm :-D

  • DekeDeke Posts: 1,635

    I've found rebooting helps as well. But this makes it problematic for those of us trying to re-render a few frames of a longer shot.  Sometimes you can't get the frames to look the same.

Sign In or Register to comment.