AccuRender nXt

advanced rendering for AutoCAD

Good afternoon,

I just got a Dell T7610 workstation with dual 12-core Xeon processors.

Running an image as a benchmark, the processors are not at 100%.  they seem to max out at about 66%.  I tried to adjust (nxtthreads #) to 48, but it resets to 32 - this is what comes up as a maximum it seems.

I also checked affinity for acad.exe.  It shows all cores available.

Is there some setting I'm missing?

I've attached a screen shot of AutoCAD / Accurender along with a shot of task manager at the highest point.

screen%20shot1.jpg

screen%20shot2.jpg

thanks for your help.

Ron Eddy

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Try the hybrid engine.  The standard engine may have more trouble keeping that many threads fed.

Ok, I don't get something.  For the sake of experiment, I ran three versions of the same image.

S40, 40 passes, standard engine, 1.4 hours

H750, 750 passes, hybrid engine, 2.6 hours

H5580, 5580 passes, hybrid engine, 19.5 hours

after 19.5 hours the hybrid engine still shows speckles - what am I missing?

Attachments:

Ron könntest du deine DWG Datei hier mal posten, wenn das geht.

Ich habe hier einen 6 Kern Rechner (980i) und einen 10 Kern Rechner (XEON Rechner) und würde das gerne mal bei mir testen wenn das möglich wäre.

Alfons

This really is a problem, I usually still use the standard engine. Just have a question to ask, What is your shade material can not share with you, thank you.

if you mean the lampshade material, here's the definition (anything not listed is left as default):

Lampshade, Advanced material, Color 247, 239, 230

Balanced Shader, white highlight, intensity 0.38, sharpness 0.65

Transparency 0.79, IOR 1.25, translucency 0.76

Bumps: Sandpaper – strength 0.03, scale 0.354, 0.354, 0.354, Wrinkled – strength 2.0, scale 45.0, 45.0, 0.50

I'm happy to take a look at the drawing if you'd like-- noise is definitely an artifact of the hybrid and path tracer engines-- but I have a feeling there's a problem with the model which is causing excessive noise in your case.  

Were the cores better fed in the hybrid case?

The file is 22.5 MB - I can cut stuff out of it to get it down to 5MB but it's possible that would take the problem with it, right?  Even removing everything except what's in the image it's still over 12 MB ... or do you have a way available to transfer a larger file?

Is there anything in particular that often leads to noise?  This model has a lot of glass, a reflective floor, a fair amount of metal, and a grid of invisible lights.  Would these be contributors?

To answer your question, core feeding was same/worse with hybrid than with the standard

Try http://www.rhino3d.com/upload/?to=roy@mcneel.com.  People have reported some time-out issues with this mechanism, so if it doesn't work we'll figure out something else.

Invisible lights are a big issue.  I can only guess without seeing the model, though.

I find the best results come from the Path Tracer engine, but for an interior like yours, you'll need to run it for at least 2000 passes.

The standard engine gives horrible lighting and banding and struggles with soft reflections. The Hybrid engine can't deal with soft shadows and requires 3 times as many passes as the Path Tracer engine.

What you find is that they jump up and down throughout.

There's no limit. I run my renders on an 80 core renderfarm quite happily.

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Peter Milner replied to Roy Hirshkowitz's discussion AccuRender Studio
"Yes, the glass material translated as Refractive automatically."
Dec 23, 2020
Roy Hirshkowitz replied to Roy Hirshkowitz's discussion AccuRender Studio
"Yeah-- like I mentioned the caustics are accurate but could be annoying.  Things that might alter it include changing the sun angle so it's not striking the chair's metal surfaces so directly, changing the roughness of the chair…"
Dec 23, 2020
Peter Milner replied to Roy Hirshkowitz's discussion AccuRender Studio
"Here's the latest render using metallic materials. The chrome now looks a lot better. I do feel though that the reflected light on the back wall is too bright."
Dec 23, 2020
Roy Hirshkowitz replied to Roy Hirshkowitz's discussion AccuRender Studio
"Ah-- so that's a function of the material type.  The standard material won't give you a mirror anymore.  You need to change the material to metallic and you should get something more familiar.  Use the Type popdown on the…"
Dec 18, 2020
Peter Milner replied to Roy Hirshkowitz's discussion AccuRender Studio
"Pacing a mirror on the back wall (reflections = 1.0, noise = 0.0), you can see the difference more clearly (top image is nXt)."
Dec 18, 2020
Peter Milner replied to Roy Hirshkowitz's discussion AccuRender Studio
"You can see from these two images that there is definitely something wrong with reflective surfaces. It appears the light is being reflected, but not objects or textures. In the nXt version (top image), the carpet texture is being reflected in the…"
Dec 18, 2020
Roy Hirshkowitz replied to Roy Hirshkowitz's discussion AccuRender Studio
"It's interesting-- overall the quality of this interior is very high for that short amount of processing, and may be acceptable for certain scenes.  In this one, however, there are some reflective caustics that are taking longer to…"
Dec 17, 2020
Peter Milner replied to Roy Hirshkowitz's discussion AccuRender Studio
"ARDECAL now works. Here's the image after 10 minutes of rendering. I do have a slight concern that reflective surfaces seem rather dull. This is particularly evident on the end frame of the desk and the base of the chair."
Dec 17, 2020

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