3D-Daz Daz3d Art - Show Us Your DazSkill

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DitaVonTease

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Jul 25, 2021
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Thanks I will give that one a go, I was under the impression that SY Invisilights were a post 4.20 product though, not sure about the other one I was using though

I think it's KindredArts second ghost light set, I'd need to check on when they all came out, but those 2 of yours are older versions...
 
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Greengiant3D

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Apr 28, 2018
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I think this is normal. I ran a test where with one ghost and two spotlights my render took 28 minutes. With just the ghost it took 17 minutes. With just the two spots it took 8 minutes.
I would be pretty happy with a 28 minute render, In my case if I use a spotlight and ghost lights together its going to take a couple hours at least to clear up the noise, I remove the ghost light or the spotlight from the scene then it will be done in 15 to 30 minutes, It just doesn't seem right to me, I can just use like a mesh light or a point light instead of the spotlight, that solves the issue, I'm just a big fan of spotlights.
 
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Impious Monk

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Oct 14, 2021
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I would be pretty happy with a 28 minute render, In my case if I use a spotlight and ghost lights together its going to take a couple hours at least to clear up the noise, I remove the ghost light or the spotlight from the scene then it will be done in 15 to 30 minutes, It just doesn't seem right to me, I can just use like a mesh light or a point light instead of the spotlight, that solves the issue, I'm just a big fan of spotlights.
Well, this one took me six hours. I'm using a 3090, rendered in 2K at 99% convergence. I had three spots on the model, a fourth spotlight coming through the window, and a large overhead ghost light. Bloom filter on, max path length -1. Several reflective surfaces and the space behind the model is walled in with everything retextured from the way the asset came. I'd love to have someone tell me that it shouldn't have taken six hours, but I wasn't able to get a better result with different settings. 3-4-x1.jpg
 

Greengiant3D

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Apr 28, 2018
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Well, this one took me six hours. I'm using a 3090, rendered in 2K at 99% convergence. I had three spots on the model, a fourth spotlight coming through the window, and a large overhead ghost light. Bloom filter on, max path length -1. Several reflective surfaces and the space behind the model is walled in with everything retextured from the way the asset came. I'd love to have someone tell me that it shouldn't have taken six hours, but I wasn't able to get a better result with different settings. View attachment 2922776
Nice render by the way, The only reason why I was thinking it was some other sort of issue was because when I bought these products a couple months ago they worked fine, I had no issues, render times weren't that much different, then all of a sudden no matter what my lighting set up I started having this problem, it doesn't matter if I have a really basic light set up or a really complex one, as soon as I use try to use a spotlight and ghost light together the spotlight starts creating tons of noise, If I replace the spotlight with a point or mesh, render times will return to a reasonable time, But those don't really create the same sort of light you can get with a spot.
 

Impious Monk

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Oct 14, 2021
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Nice render by the way, The only reason why I was thinking it was some other sort of issue was because when I bought these products a couple months ago they worked fine, I had no issues, render times weren't that much different, then all of a sudden no matter what my lighting set up I started having this problem, it doesn't matter if I have a really basic light set up or a really complex one, as soon as I use try to use a spotlight and ghost light together the spotlight starts creating tons of noise, If I replace the spotlight with a point or mesh, render times will return to a reasonable time, But those don't really create the same sort of light you can get with a spot.
I'll be watching to see if anyone can offer a solution.

And thank you for the compliment. All your work is S tier, my friend.
 

Greengiant3D

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Apr 28, 2018
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I'll be watching to see if anyone can offer a solution.

And thank you for the compliment. All your work is S tier, my friend.
Thanks for taking the time to trying to help me out, like I say I can get by without ghost lights, it's just they are really useful at times, mostly for daytime interior scenes, which is an area I still really struggle with.
 
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m4dsk1llz

Engaged Member
Feb 13, 2019
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Well, this one took me six hours. I'm using a 3090, rendered in 2K at 99% convergence. I had three spots on the model, a fourth spotlight coming through the window, and a large overhead ghost light. Bloom filter on, max path length -1. Several reflective surfaces and the space behind the model is walled in with everything retextured from the way the asset came. I'd love to have someone tell me that it shouldn't have taken six hours, but I wasn't able to get a better result with different settings. View attachment 2922776
This may not be affecting your render times, but maybe it could be a factor. Most renders do not need to have light path lengths set to infinite. In Render Settings >> Optimization >> Max Path Length the default setting is -1 and that will contine to calculate the paths until DAZ thinks there is no more light to bounce. In most cases setting this value to a positive number will only allow the path to be calculated a finite length. I am supposing that when you use ghost lights that there are just too many paths to calculate and that is why your render may be taking so much longer.

In the render you posted, there are only a few reflective surfaces and with matte or flat surfaces light falloff is so significant you could likely get away setting the max path to 8 or even less. That could exponentially lower the render times.

Also note, that DAZ calculates these light paths for the entire scene not just the visible portion. That is a lot of calculating, and all of that is being done on your 3090.

I have used ghost lights in the past and noticed a similar lengthening of the render times. Now I just add more lights or lights with a wider dispersion to accomplish the same thing ghost lights do. Although there are some situations where ghost lights may be the only answer.

Edit: Just to be clear, setting it to infinity does not actually mean DAZ calculates the path to inifinty. It will stop when there is no more light to bounce, in some cases this could be less than if you set it to a specific number. But most of use don't render a single asset in the void of space, so there will be paths to calculate.
 
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digitbrush

Member
Apr 5, 2019
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Well, this one took me six hours. I'm using a 3090, rendered in 2K at 99% convergence. I had three spots on the model, a fourth spotlight coming through the window, and a large overhead ghost light. Bloom filter on, max path length -1. Several reflective surfaces and the space behind the model is walled in with everything retextured from the way the asset came. I'd love to have someone tell me that it shouldn't have taken six hours, but I wasn't able to get a better result with different settings. View attachment 2922776
This is my render settings...

Render quality Enable: off (it will turn everything off below)
Max time : 0
Max Samples : 5000-15000 (max is 15000, you will likely never reach this)

What these settings do is basically let the renderer go on forever and you manually cancel the render when you think it is done. I render at 5000x3000 with a 3090. I keep an eye on the samples , usually go to 500 samples...sometimes 1000...and it looks great for me. you can see my work here on various channels. At 5000x3000, you can scale it down and get even more detail afterwards. Don't forget, that you are also using DOF in your renders i assume, so you can dial down the texture details in the background and speed up the render as well.

lastly, as a test, do this same render for 30 minutes then cancel and save.. compare it to your 6 hour render. can you really tell the difference unless you zoom in all the way? personally, its minimal for me. if there are a lot of scene lights (spot, spot,etc) there is a certain time to make the little white flies resolve themselves..thats the nice thing about Hdri lighting. Photoshop/Gimp has a nice filter that removes them if need be.
 
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HawkyDawky

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Mar 18, 2019
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Greuceanu

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Jul 28, 2017
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AI's enhancement is too much visible for me, sorry, I have a bias with that !

Well most AI porn is shit, it sucks and it's pretty stupid, I am trying to build a different type of content, along with an Expert Daz artist. I am trying to make highly detailed and almost realistic porn, it's a complex combination of actions to get from a render to a AI image.

I am trying to test the market and see if people would love the style vs regular 3DCG.

What's your bias against AI work? I hate what's out there today as well, pretty much what AI is good at, a single portrait of a expressionless person:) with really bad hands and feet
 

darkside80

Active Member
Jun 25, 2017
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Does anyone know why I cant seem to use spotlights and ghost lights together? this has been going on for a while and I've just been lighting my scenes in other ways, but ghost lights are useful so I would like to get them working, This issue is with both SY Invisilights and Iray Ghost Light Kit One I will provide some images below which I hope will show my issue more clear than I can explain

Image one this is just one spotlight that I am basically faking the sun with for demonstration purposes, and the hdri in the background as you can see everything it working fine, the noise clears up relatively quickly and I've got some okay basic lighting going on

View attachment 2922317

Image two this is with one ghost light on from the Iray Ghost Light Kit One kit usually I will perhaps put them near the windows to add a bit of more light to the room, as you can see the spotlight is now just a noisy mess especially compared to above image, If I render like this (I've tried) I'm looking at a very long render, I've also left it for a while to see if it clears up in the viewport, it don't

View attachment 2922323

Image 3 basically same thing as above just with a different product, When I first purchased these products they seemed to work with spotlights fine, as far as I can remember, also I can add mesh lights or point lights and everything works just fine, it's just the spotlights, Oh and just to mention I am using spectral rendering here but the problem is the same with it on or off so that is not the issue. Maybe I'm just being thick and this is to be expected, but surely using ghost lights and spotlight together shouldn't result in this noisy mess and massive increase in render time?

View attachment 2922325
I've tried to reproduce the effect you have in your scene, or at least something similar.
There's a setting in daz that reduces the noise, i'm not sure if it works as expected in your case, but it's worth a look.


In the scene there is only the hdri + a spotlight + a ghost light placed in front of the windows
Spot_Ghost_light.png

I set it to 500 iterations for the test.
on the left I left the default settings.
on the right I set nominal luminance to 400 and Noise degrain Filtering to 4.

Noise degrain.png
noise degrain.png
 
5.00 star(s) 13 Votes