Inscrutable Iray
laststand6522732
Posts: 866
I don't know why my IRAY GPU usage should be 99% when no action has been requested of it whatsoever. The screen shots show what I mean. It doesn't matter how long I wait, the GPU usage never comes down. (I have seen it come down after ten minutes or so.) Orbiting the camera is almost impossible. I've pressed every button I could find many times. I've reset Iray to the defaults, Nothing has helped.
And then there's that white dot in the ULHC of the screen. It seems to be associated with one of the spotlights. Once again, "press every button" mode has failed me.
Hints, clues, I would be greatful for anything at all.
Thanks.
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When you go to Iray mode it renders the image in your viewport, that takes all the GPU power it can get. Try the texture shaded mode if you want to change something in the scene.
Your Viewport mode is set to Iray Preview, so D|S is constantly calculating an Iray render. Click on the little Iray icon in the top right corner beside the "Camera" label, you'll get a dropdown menu of all the Viewport modes. The best one for working on your scene is probably Texture Shaded (but try the others to see what they do). Setting it to Iray Preview should really only be done to check everything's OK before you do a final render.
Thank you both.
I wonder what kind of resources it would take to rotate a 10M file around the workspace in real time, in Iray mode, without going for coffee while the screen repaints.
Any thoughts?
It depends on your settings and your hardware. I have a 1080 ti and changing something in Iray mode can be close to impossible depending on the scene complexity.
However if you could change it to interactive instead of photoreal in the Render Settings > Render Mode for the time you know you want to change things around. Just make sure to change it back to get better results once you want to complete your render.
It also helped me to change it to GPU only instead of using the CPU too. For me GPU only renders faster than GPU and CPU.
Also watch this video
it helped me a ton to speed things up even more
Go to the Window menu and open up the Draw settings window. In there under Drawing you can change the Response Threshold in msec and the Manipulation Resolution used in the window or the aux view, whichever is being used in Iray mode.
Ha! That's what I'm talkin' about! I thought it had something to do with draw settings, and I even started fooling with Render Throttle, but I just wasn't getting there! Thanks!
Now...you wouldn't happen to have a clue for me about that softball-size white dot on the green plane, would you? I turn off a particular spotlight and it goes away, but I can't find the switch that makes only the dot go away.
If you have the light selected and you are using the Universal Tool then there are control points that appear that can be clicked on to manipulate the light. The ball is one of them. When you left click and hold on it the direction of the light can be moved around and the Ray Length changed. There is also a square box that is used to change the spread angle. They don't show up in the render though.
I know that ball you're talking about, the one on the end of the beam. Below is an Iray render. You can see two white dots in it, so it's not the beam ball. I thought it might be Render Emitter, so I turned them all off. The white dots remain. If you would, please, take a glance at my light settings. They are associated with one of the dots. I suspect the issue is here.
I have only recently realized I could use "regular" DS spotlights in an Iray render, so I am learning the subtleties. I like the way they work, but these white dots are not part of the plan.
Thanks.
Those dots seem like the reflection of the spotlights on the background, but I maybe wrong
Ha ha ha! I selected the green plane, I went over to Surfaces, and I changed Lighting Model from plastic to matte. Voila! Dots be gone! I never would have figured that out!
My hat is off to you.
I'm glad you got that sorted. Just as an aside you don't really use Intensity with Iray, I see it is set at 5%, you lower the light output using the Luminous Flux setting.
I've been thinking of Flux as a course adjust, and Intensity as a fine adjust. Not right?
Thanks, I checked him out, and I did pick up something useful. I don't prefer video tutorials in general, but his pacing is mercifully quick and his English is more comprehensible than many. He seems very good at identifying key subjects and sticking to them. I will view all his Iray stuff.
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From the beginning I've made some assumptions about Iray in DAZ that were just not correct.
I never use the Intensity slider and just leave it at 100% and adjust the light using Luminous Flux setting.
That's simpler, I'll try it.
No, it's definitely a 3Delight/Iray split. Look again at the actual lighting parameters the next time you select a light while in Iray rendering mode. All the parameters in the list below the "Photometric Mode" switch are Iray parameters, all the ones above are for 3Delight.
Iray lights behave as closely as possible to actual physical light sources: Flux (or Luminance) is an actual measure of emitted light, and you should use it together with Temperature, which measures the colour of hot glowing objects (the default of 6500°K is white sunlight, which doesn't apply a colour cast to the light). Look up "black body temperature" for other useful values.