Help with lighting/render completion

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by marvins_dad » Tue Aug 29, 2017 3:07 pm

I have been working on a design for about a week, but noticed that rendering either with TR2 or Presto (AO and MC) - it never fully renders. There is always noise in the glass that never fully renders out.

I am using a ton of point lights and an array of material emitters. I'm sure this has a lot to do with it, but I am not too sure how else to get the lighting effect I am going for.

Here are some of the 2+ hour renders that ended on their own and said they were complete.
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LPD-interior_2017-08-28-2017am-Scene 69.png
LPD-interior_2017-08-25-2017pm-Scene 69.png
LPD-interior_2017-08-25-2017am-Scene 69.png
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by marvins_dad » Tue Aug 29, 2017 3:16 pm

...and here is where I have never been fully educated, my trial and error lighting settings...

The Omni's - I am using a Pointlight - Power 750 watts, efficacy 250.00, inverse square
Emmitter on the fixture in the coffers is an Emmiter Power 3500.0 watts, Passive is unchecked and Visible is checked....BSD Settings Global and Caustics are both checked.

Currently rendering with TR2 because the Presto images didn't get this complete before "finishing."

Of course...when I change from TR2 to the Presto I have to adjust all the lighting because there is a huge difference in the two render engines? I recall going from Presto to TR2 and the TR2 was blown out, way too bright.

Any assistance is appreciated.
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LPD-interior_2017-08-29-2017-raw.jpg
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by marvins_dad » Wed Aug 30, 2017 2:52 pm

Is it because I am dialing up my wattage really high and not using the efficacy to increase the output power of the lights?
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by Solo » Wed Aug 30, 2017 4:47 pm

Care to share the scene? I would like to try using hidden planes instead of point lights, should improve and speed things up.
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by marvins_dad » Fri Sep 01, 2017 5:56 pm

Thanks Pete! I need a master class in lighting (apparently).

It's a Revit model export that I am working on a few room interior shots in SketchUp.

Here's a Dropbox link...
https://www.dropbox.com/s/9imlqg5fyqx9v ... e.skp?dl=0
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by Solo » Sat Sep 02, 2017 4:05 pm

Just seen this now, will give it a test.

Using omni lights below the coffers will not be a true representation of the lighting once built, I'd remove those and only use the lights in the coffers to illuminate the room, may mean adjusting the intensity.
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by Solo » Sat Sep 02, 2017 4:47 pm

Okay,

I switch off the "lights" layer (omni lights)
Using only the emitters in the coffers set to 5.0 W/nm/sr/m2

Rendered with Presto AO, Tracing depth 25, diffuse depth 1, samples/px 4096
ISO 200, CRF Agfa color vista 100, White Balance 5200
10 min 23 seconds.

LPD-interior_2017-08-29-share-Scene 71.png


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by marvins_dad » Mon Sep 04, 2017 8:33 pm

Thanks Pete!
Will give it a try.
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by marvins_dad » Wed Sep 06, 2017 2:00 pm

I am amazed at the settings you tweaked. I can get maybe ISO and color...but the others must just come from years of working with the software?

Thanks!

I was able to get my clear render down to about 30-45 minutes...but then I had to add some point lights to the vesibules so they didn't seem so dark and that was when I couldn't get clear glass anymore. I guess best to use emitters over point lights?
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LPD-interior_2017-09-05-am-Scene 70-post.png
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