Optix or not to Optix
tring01
Posts: 305
Been experiencing my first ever crashes and lock ups with IRay recently. Spent the whole day turning things on and off and loading and unloading assets from the scene. What I found is that there was one wardrobe product that was putting my render (three G3 females plus a minimal amount of scenery) over some limit. Daz would load up my system RAM completely and then the computer would just freeze hard. Task Manager couldn't even recover it.
What I eventually came across was that Optix Acceleration was the villain. Once I turned it off my render returned to normal and runs happily in about 15 minutes. Not a huge scene really.
Anyone else experience problems with Optix Acceleration? I'm not sure if I should submit a ticket or not. Don't want to bother TS if it's a problem unique to me.
Thanks and Happy New Year!
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Comments
I did some tests at first; at best there was no real improvement to using it, and sometimes it was worse. Haven't used it since before release of 4.8, except the occasional retest which didn't make me reconsider.
Just like many other parts of rendering there is no 'right' answer...it's something that needs to looked at on a case by case basis.
And yes, submit a ticket, because it could be a problem with that item, instead of a general one. Even if the item isn't a store item, there can be something in its settings that can alert everyone to a potential problem.
One of the Daz developers stated at some point that the Optix acceleration makes a trade off by increasing the RAM used on the video card in exchange for a somewhat faster render. Unfortunately, that was about all of the detail provided. In the OP's case, depending on the amount of RAM on the card, and the size of the textures being loaded, it's possible, I suppose, that the Optix setting caused the render to fail over to CPU. I've had a few incidents where a CPU render completely saturated the 32GB of RAM on my PC, resulting in the same freeze described. It may be worth noting, I haven't had this happen with the v4.9 beta.