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Sudden slowdown

hermun81hermun81 Posts: 101
in New Users

About halfway through a series of renders 3Delight started taking much longer to render the images.  From 2-3 hours to 8-12.

I made no changes to any technical stuff like lighting (which I know can slow thing down) and it's been horribly slow ever since, even with totally unrelated projects.

Can anyone think of something that might be to blame?

Comments

  • mjc1016mjc1016 Posts: 15,001

    How are you rendering them?  One after another, image sequence, something else?

    To a new window or direct to a file?

  • hermun81hermun81 Posts: 101

    One after the other, to a new window.  Daz 4.8.

  • JimmyC_2009JimmyC_2009 Posts: 8,891
    hermun81 said:

    One after the other, to a new window.  Daz 4.8.

    If you post an image of your Render Settings pane, someone may be able to help.

    One thing to check is the Shading Rate which can drastically affect render times, what is it set to?

     

  • SteveM17SteveM17 Posts: 973

    You could try altering progresssive on/off. That helped me.

  • mjc1016mjc1016 Posts: 15,001

    How much memory?

    I think each one is being held in memory, so you will eventually run out and then virtual memory will be used...swapping to disk is always going to slow things down.

  • hermun81hermun81 Posts: 101
    JimmyC_2009 said:
     

    One thing to check is the Shading Rate which can drastically affect render times, what is it set to?

    0.010

     

     

     

    mjc1016 said:

    How much memory?

    I think each one is being held in memory, so you will eventually run out and then virtual memory will be used...swapping to disk is always going to slow things down.

    Do you mean free disc space?  Or saved scenes? 

  • StratDragonStratDragon Posts: 3,167
    edited November 2015
    hermun81 said:

    About halfway through a series of renders 3Delight started taking much longer to render the images.  From 2-3 hours to 8-12.

    I made no changes to any technical stuff like lighting (which I know can slow thing down) and it's been horribly slow ever since, even with totally unrelated projects.

    Can anyone think of something that might be to blame?

    1) displacement maps and raytraced shadows.

    2) reflections in small objects that may be enabled but unnecessary.

    3) backround task such as AV scan.

    Post edited by StratDragon on
  • mjc1016mjc1016 Posts: 15,001

    Shading rate of 0.010 is insane...you shouldn't need to go under 0.2 and even that is a bit on the low side/final render. 

    And total RAM/free RAM, not disk space.

  • frank0314frank0314 Posts: 14,049

    shouldn't go any lower than .1 for final renders and .2-4 for test renders. Most people use .1

  • SteveM17SteveM17 Posts: 973

    As Stratdragon said check for reflections in small objects. I once had problems because several belt buckles and clasps had full reflection settings that were not needed.

  • hermun81hermun81 Posts: 101

    I didn't change the shading rate.  I haven't changed any settings that I know of, I tend to just press the render button...

  • JimmyC_2009JimmyC_2009 Posts: 8,891
    hermun81 said:

    I didn't change the shading rate.  I haven't changed any settings that I know of, I tend to just press the render button...

    Perhaps loading a previously saved scene has changed it, that can happen.

    Did setting the Shading Rate back to 0.2 fix your problem?

     

  • hermun81hermun81 Posts: 101

    Tried it out with a higher shading rate and it's fair flying now.  Thank you all kindly.

  • darth_giles@yahoo.comdarth_giles@yahoo.com Posts: 12

    Ok, so this is a bit of a necro, but thank you. I had this exact same problem, and my shading rate had somehow gotten turned all the way down to .01. Thanks. My 3Delight renders are back at full speed now!

  • FirstBastionFirstBastion Posts: 7,760

    Check how much free space you have on your hard drive C:/  atleast 25% free space helps it run more efficiently.

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