Spiral patterns in renders DAZ Studio [solved]
EZ3DTV
Posts: 1,494
Does anyone know why this is happening and how to correct it?
Post edited by EZ3DTV on
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I may have stopped the render too soon... Iray seems to render in a circular pattern.
I have isolated the "spiral patterns" they are spiral and not circular.
I am not sure what causes this spiral but it is an obvious distortion of the final image.
There must be a setting in the lights that make them finer and fixes these spiral paterns. Maybe a render setting needs to be turned up?
spirals in render
Well, I figured out what causes these spiral patterns. Just wondering if anyone is curious what it is.
I would like to leave this query to linger a bit longer to see if anyone else knows the answer. :)
(Hint) I am able to turn them on or off with one click of a button.
A terrible distortion that runined three, six hour renders.
RexRed, this is not a helpful thread if you want to play guessing games instead of providing the symptom and solution. It's likely nobody here knows what type of light you're using (emissive, spotlight, other?) or which version of DAZ or iray you're using, or how your scene is built, or what other numerous modifications have been made.
Neither threads or posts are removed unless they offend aganst the ToS, so you can leave it here as long as you like, it will just drift slowly down to the bottom of the pile.
But if you do have a solution, posting it would help others who are experiencing the same problem. This is the idea of the forums.
Never happened to me may be because I tend not to use spotlights with iray. I am curious what it is though if you'd share your solution and may be some steps to reproduce the issue, thank you.
Okay, this issue happened, when I had "Caustic Sampler" turned on in the optimization area of the renderer.
I turn it on and my lights get spirals I turn it off and they are gone.
Maybe this is due to my graphics card being a Nvidia 1080ti, I don't know.
I rendered this file three times and each render took over 6 hours and were ruined by these spirals. Maybe some can imagine my frustration.
Then I poured over settings turning them on and off one by one to see if I could figure out what the problem was.
Now, if anyone Googles spiral paterns and DAZ Studio they will have a solution to this problem and not have to go through what I had to go through to fix it.
Hey "Pad One" I use spotlights almost exclusively becasue of the focus control and dramatic effects they can create on my figures.
And, Dijitul, this "gussing game" may not be helpful to you but it is helpful to me in finding out who has a firm understandign of DAZ Studio in areas like this one.
I left this up for days and and no one responded at all. I was wondering if people just did not want to help me or if no one really knew the answer.
Oh well, problem solved.
Going to go out on a very, very thin limb here ... with just 2 spots, and with caustic sampler on, could it be some form of intererence pattern?
That is quite possible, I had more than one spotlight in the scene.
I can confirm the issue with the caustic sampler enabled. I got it with a single spot light so it's not an interference as supposed by @SimonJM. I found out that it depends on the distance of the camera from the subject though. That is, if I close up the camera then the spiral goes away, if I distance the camera then the spiral returns. Also the denoiser doesn't seem to be able to fix it, that is, even if I enable the denoiser the spiral stills there.
With some quick tests I also found that choosing rectangle instead of point for the spot light geometry seems to fix the issue. My guess is that the caustic sampler is more demanding than the standard sampler and may have issues with a point light shape since point lights are not physically correct. That is, every light in nature has a shape, then it may be a tiny spot but never a point.
Steps to reproduce the issue:
1) place a plane and a spot light in the scene to illuminate the plane
2) turn on the caustic sampler
3) set the environment to scene only and render
Possible fixes:
1) turn off the caustic sampler
2) close up the camera
3) in the spot light parameters choose rectangle as light geometry