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Is it normal for iray to be so slow?

bluenataku45_1b70ee5aebbluenataku45_1b70ee5aeb Posts: 1
in New Users

Im a new user trying to transition from poser to DAZ Studio.  my biggest beef is with the render times. usually in poser with a complex scene it would take roughly 2 mins to render 5 figures in a scene fully clothed. however in daz using IRAY Its taking closer to 25-40 mins for just one scene that is similar with no environment at all.  ive tried some "fixes" around the net but nothing seams to speed up the render.  i was just wondering if there way anything im missing to speed it up.

Comments

  • PaintboxPaintbox Posts: 1,633

    Because IRAY is a so called “unbiased” render, and mimicks real world light casting, it takes a long time to render. Basically the render “converges” which means the closer it gets to 95% (standard treshold value) , the greater the accuracy of each pixel. This process is inherently slow.

    There are ways to speed it up. The first using the best GPU you can throw at it, which means a NVIDIA card. Most other tricks revolve around having the least amount if light bounces in your scene. Rendering just a figure in empty space is quick. But as soon as you add a wall or furniture etc, youll see render times pick up. There are a lot threads with tips, just google iray speed and youll find them.

  • BeeMKayBeeMKay Posts: 7,019

    Iray is slow, that is true, but in Poser it would be equivalent to Superfly. I'm not sure how much that takes for rendering the same?

    Also, it's worth noting that the "finish" settings are deliberate. Iray would render indefinitely without them. By changing the render settings, you can shorten the render times, number of iterations, etc, or simply stop the render when you think the quality is sufficient.

    And yes, Iray speed very much depends on having a good nVidea card with plenty of CUDA cores and sufficient VRAM. Are you rendering CPU, or GPU?

  • jtljtl Posts: 1

    Coming from years of Poser work, I have struggled with this for the last couple of weeks as well and actually the answer is so simple; you just have to use iray materials for iray renders and 3Delight materials with 3Delight renders, that`s all. A 90 mins render (with 1080 Gtx mind you) went all the way down to 10 mins with the correct material matching. This is valid for all materials, skin and hair included. This info might be a given for older Daz Studio users but I wish it was mentioned mnore obviously for those who come from Poser.

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