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HELP LUX Render Questions

DAZ|Studio Pin-ups posted on Sep 19, 2013
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Description


I rendered this image for 22 hours In LUX and it still has problems. What bothers me are the little dots still noticeable along her left leg and still in her skin in general. Also the colors are very washed out - blues, reds, and yellows - compared to how they appear in 3Delight. In fact the entire image is very washed out for some reason. The image was rendered at 2000px x 2500 px. (Too small?) with lights from Inane Glory's Photo Studio. I have notes on all my settings but will give just a few here: Bucket Size:16 Max Ray Trace:4 Pixel Samples (X&Y):16 Shadow Samples:64 I also set my RAY TRACING Occlusion Samples at 128. Those seem to be the settings that influence the final quality of the render the most, at least as far as I know. I welcome a dialog with anyone who may be learning LUX or with anyone who has been using LUX for awhile and knows how to use it better than I. (I use LUX via LUXUS altho I suspect the setting must be similar in REALITY for LUX) By the way the real title of this image is Smoking: So What Could Possibly Go Wrong?

Comments (21)


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barryjeffer

4:34PM | Thu, 19 September 2013

I don't know anything about Lux... but this is very nice. I like the lighting and her general attitude!

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colmarq

4:34PM | Thu, 19 September 2013

I use on occasion reality and I know that the settings in DazStudio for 3Delight have no influence on Lux render at all. While lux is rendering try altering lux`s settings and try the different photo response settings as well. If you use a photo response you will have 2 gamma settings to play with to lighten and darken the image. Remember that Lux is an unbiased renderer and you cant force it to do things that go against physics,unlike 3delight.

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Rhett55

4:36PM | Thu, 19 September 2013

I use Lux for almost all my renders, but I export through Reality. One thing I've found if I use anything other than Reality lights; you need to put descriptive names on all your lights, ie, "left front", "Low highlite", etc. Then after render starts, readjust all your lights in Lux. I generally slide them all way down, almost off, and adjust them individually. With Daz lights, they seem to interact in some strange ways. I had hoped the Daz exporter would have fixed the probs with Daz lights, but apparently not so much. If they're right in the 3dlite render they'll be way to bright in the Lux version. Also, you can get away with a lot fewer lights in Lux because of the way it figures bounce and such. A lot of calculations which is prob why you still have artifacts after so long a render. How many lights did you have in this scene? And what type?

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Greywolf44

5:29PM | Thu, 19 September 2013

Sounds like you got a lot of advice so far. My time with Reality and Lux was short, but I did end up with one important factor. If you start with your sunlight only and set it to about half the default you will get a good base for what you do next. You can add lights here and there for items and gradually brighten them up as well as the sunlight. Once you have things set to how you like them, then you have a good setup for future renders. Did I say you are going to have to do a number of tests, but if you do the tests at a reduced size, you can cut down on render time. Good luck. PS This image is a really good start. I like.

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b-vone

7:28PM | Thu, 19 September 2013

Well....A lot of the problems and concerns that you've had with your renders recently sound like the ones that I had with the 1st Reality software. I was getting flat cake like skin, jagged shadows and of course as "Reality" likes to call them, "Fireflys". all the little dots. I'll be honest I have absolutely no idea when it comes to Gamma, Ray traces, Flux Capacitors... ;-) I honestly think that this Luxus program is just not as up to par as the latest Reality, with regards to keeping things true, as it moves over and renders in Lux. The only real issue that I have lately with Reality is as someone mentioned, Daz lights. I do have much better luck with Reality lights, or even the "Convert to light" feature we have talked about before. I hate to say it but this may be a round peg, square hole situation. ;-) The latest Reality is only $29 I think. I guess a small price for this headache remedy. PS. I have noticed anything over 4-6 hrs on a render doesnt seem to make a lot of difference. I do commonly set mine before I go to bed. just to have a surprise in the morning I guess. ;-) Oh and you mentioned size. the 2500 X 2000 is what I actually have mine set to. anything bigger and i can have issues, especially with many different lights. OK seriously, one last thing, I do Love the pic idea though !

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TW1

7:44PM | Thu, 19 September 2013

I use Reality but I'm sure Luxus is similiar. Try starting with the Lux sun(or IBL) and a Daz Distant light. You can then change view(in Daz) from default camera to sun or distant light to manipulate the lighting and shadow angles. This will dramatically affect time of day,etc. I will then add another Lux spot or mesh light for fill. When in Luxus(or Reality) make sure that IBL lights are checked and pick a camera type(does not matter you can change it in LuxRender later). Also make sure that Luxus has carried over your bump files for textures (or enter them manually) or you will have no depth to your textures. Render in Lux. The beauty of Lux is that you can edit in real time while rendering. All lights can be adjusted and individually turned on or off. Lights can also have color adjustment by turning on BlackBodyTemperature.For photorealism try 8910.Also Lux acts like a camera so changing camera type,gamma, exposure,fstop,etc. all will change render dramatically.Finally, on the very bottom of Lux you will see s/px(samples per pixel)numbers, I have read that a decent quality is 500-800 and great is 2-3000s/px.(this could take days). And for any leftover imperfections Photoshop or Gimp. I hope this helps and I like your image.

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bebopdlx

10:38PM | Thu, 19 September 2013

I have never had ant luck with Lux or Reality, all my work had the same little dots. Still nice work.

ronmolina

12:51AM | Fri, 20 September 2013

It is the lighting. Set up each light individually in reality. Give each it's own group. The fiddle with them in Lux to find the offender.

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giulband

1:46AM | Fri, 20 September 2013

it's a good work

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illkirch Online Now!

6:18AM | Fri, 20 September 2013

Anyway this pic will self-destruct in a few minutes. Sorry I cannot help. Don't use Lux

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3DClassics123456

6:37AM | Fri, 20 September 2013

Unfortunately, I just want to be a 3D objcts modeler, not an artist. So I can't help you. But the idea is very good, and the final render nor bad!!

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eekdog

7:35AM | Fri, 20 September 2013

sorry cannot offer help since i dod not use that program my friend. looks super on my end.

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kassad

7:48AM | Fri, 20 September 2013

Hi, I don"t know how much lights you use, but, as already mentioned, try to use just one or two light at the beginning. For the red dots, I know the problem and it's not related to the time you run luxrender but to the setting of lights. I have the same problem with Octane using C4D. Solution -> Photoshop. By the way excellent concept. B->

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Jean_C

10:27AM | Fri, 20 September 2013

Anyway a beautiful scene with excellent pose and pov! Superb image.

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Cyve

9:30AM | Sat, 21 September 2013

WOW... It's realy fantastic concept and fanulous creation... Wonderfully done !

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Richardphotos

10:01AM | Sat, 21 September 2013

I can not offer any help because I do not use . I can appreciate your pose and setting. smoking on some time bombs, could very well blow her to kingdom come

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Leije

11:17AM | Sat, 21 September 2013

The washed out colors give an original render style to your images, in my opinion ! Excellent work as always !

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GrandmaT

12:56PM | Sun, 29 September 2013

I know nothing about Lux but I do like this image. The flaws you pointed out I didn't notice even after I looked for them. I say "Great job!"

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twelvemark21

10:24PM | Thu, 03 October 2013

I Have not used Luxus but for a render that size when using Reality I would let it render a minimum of 40 hours to between 3500 and 4000 light samples. When using Reality I often encounter the problem with dots if I do not use a specular map when I have transparencies in a scene or if I have a mirrored surface. This is a gorgeous scene regardless, I love the pose and classic pin-up style! Continue to experiment with Lux the results will be worth it.

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MartiniquePL

3:42AM | Sun, 06 October 2013

She must be stupid so far she is beauty, trying smoke in this room. Probably she is daughter of that man who filled my home's gas tank for winter few days ago ;). For many years I used Firefly, learned everything about lights in Poser. This spring I decided to buy Reality for Poser. Paolo made really titanic and great job making "translator" from Poser to Lux language. Except obvious problems like rendering time and high of bills for energy (yes, yes, yes I noticed ab 30% higher bills!) I don't like to work with Reality cause one important reason: I can work on scene only one time! When I decided to save file and start to prepare for Lux it is a finish with posing. Next time opening the file many items are doubled or other are lost. E.g. Victoria has 2 left boots and the right is cut off from the scene. I asked Paolo what is remedium and reason of this frustrating acts. Probably there is an internal problem in Poser and people from SmithMicro know about. So in July I decided to buy Octane stand alone and plug-in. I've changed graphic card for nVidia GTX. Octane uses graphic processors for rendering, like any video game in really real-time. Now for good results I wait 1-4 hours not DAYS!!! What is the trap with Octane? Octane doesn't understan many of Poser's texture (dunno are DAZ's textures the same way built). So I have to prepare some textures, the others are ready in material's data base (online). What is great, mainly procedural materials (coz rendering is limited to capacity of VRAM - this one of minus of Octane). All SSS materials are native type of material. What I like are the lights, You can make the spot with any shape of stream of the light, not only straight spot. And finally about dots... It's true the colour dots are in very difficult places, difficult for Lux or Octane. Places of touching reflecting and transparent materials in shadows from many lights. Sometimes helps any other direction of light, even few degree. The solution could be using less number of lights. You should think like real photograf in real world. When You make portrait You will use one, two, max three light and one reflecting screen? No more. Just imagine where are You with Vicky 4,5,6 ;-) and what kind of lights You can meet there. Lux and Octane or any other unbiased renderer are the best and only way for reality in our works. Try also with film responses, because this what limited and making "true" our renders. Greetings and all the best.

QuickR

4:24PM | Sun, 03 November 2013

Based on all the other items in the scene, this may not be a lighting problem. The tanks, floor, and wall look OK, but the skin is quite disappointing. I use Luxus not Reality. I have had similar problems, but always gave up when it reaches 1,000 samples per pixel. Some things that went wrong for me that you might try were the skin surfaces have a high ambient, the fill light (especially if its uberEnv) can wash things out. Definitely try tuning your lights as early in the render as you think you can make a difference and keep tuning as the render progresses. I do think that a number of the thing in your scene -- the hairs, her hair, will never look as good in lux as in 3Delight.


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