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DAZ Studio Render Time Increase

cheznous2029_28ab1adedccheznous2029_28ab1adedc Posts: 177
in The Commons

Am I the only one or have other noticed that if you so several IRAY renders with Daz Studio, you render times increase.  The only remedy that I have found is closing the program, relaunching it, and then reloading your saved scene file, which is a pain!

Comments

  • Matt_CastleMatt_Castle Posts: 3,011

    No, you're not - and as someone relatively new to the program, I was strongly considering asking the forum about it myself.

    It's very often the case that I'll start a render, see on the preview that some clothes are is clipping or something else that needs fixing, then cancel to quickly adjust it, only to find that second time around the render has slowed to an absolute crawl, with no way to reset it other than rebooting Daz Studio, which can take a good while even with only medium-sized scenes.

    I really would like to know if there's a better answer.

  • diogenese19348diogenese19348 Posts: 929

    Yes, it looks like if you render often enough without closing the program it switches from GPU rendering to CPU rendering.  I imagine there is a memory leak somewhere.  Anyway if you take a look at the details at the start of the render you can see it doing that.  if it says "CPU", it's time to stop the render and close down. 

  • PaintboxPaintbox Posts: 1,633

    Yeah, same here. After a few renders it becomes slower and slower, and then switching to CPU.

  • scorpioscorpio Posts: 8,533

    Are you all closing the render windows or leaving them open?

  • cheznous2029_28ab1adedccheznous2029_28ab1adedc Posts: 177
    edited October 2018
    scorpio said:

    Are you all closing the render windows or leaving them open?

    I'm closing the render window.  Same thing.

    I wonder if there is a bug report on this issue?  I'm making comics and this really slows down the process.

    Post edited by cheznous2029_28ab1adedc on
  • TaozTaoz Posts: 10,264
    edited October 2018

    Which DS version? I have no problems of that kind with 4.10.0.123. GTX 1070 8 GB VRAM, but only 8 GB RAM so I'm only rendering smaller scenes, and it's more or less impossible to hit max VRAM with so little RAM so maybe that's why I don't have any problems. Rarely use very large HDRI's either.

    If you keep a render window of the current scene open in the background any new render will render faster because some stuff remains in memory. How much depends on the size of scene, with larger scenes the difference isn't so big as with smaller scenes as it's just the initial calculations before the actual render it skips. The size of the background render doesn't matter in this respect, it can be 20x20 pixel for example to save memory; don't know if the size affects other parameters than the memory it uses.

    Post edited by Taoz on
  • kyoto kidkyoto kid Posts: 41,873

    ...Daz has issues with memory leaks when rendering that go back over a decade.

    Having to shut down and restart when you are rendering a large involved scene can take time and be a real bother.  For myself usually it usually takes 10 min (or more) for a large scene file and Daz to completely clear out of system memory (monitoring in the Task Manager processes tab), and then to open and reload the scene again.  My railway station scene takes almost 15 min load (old system).

    What we need is some type of script that purges VRAM, similar to the "clear undo stack" one.

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