Red and Blue errors on renders...Help.
MassMinion
Posts: 0
As the title states.....I'm getting red and Blue errors on my renders (little blue,red dots),they seem to be specular related.......????
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i heard if you change the camera angle one or two degrees it can fix them.
Also are you using deep shadow maps? It's a bug in them, I think if you go with ray-tracing they go away.
Sounds like the problems you get when using Deep shadow maps.
But to begin with which software are you using, what are your light setups, render settings and screen shots would help.
It's deep shadow maps. Go to RayTraced shadows and they go away... that or try doing several passes as the artifacts don't seem to appear in the same place twice...
I'm assuming you're using 3Delight and DS... it's a known issue in 3Delight.
Thanks for the quick response.....it's not a specular issue (as I thought) it was in deed a shadow issue........I was under the impression that the uber environment acted as a master control for final render output,I didn't realise that individual lights still need to be tweaked..........found that 3 of them had soft shadow setting.......switched them to ray traced shadows and the problem has gone away,problem fixed........thx again for the assist.
normally i charge but since I don't want to split my $$ with the other posters this one is on the house.
check your lighting and make sure all the shadows that are turned on are either deep shadow or raytraced
the don't play well together
I wonder if daz will fix this bug? The hair creation plug ins (LAMH and GH) are designed for deep shadows. It's been a bug for quite some time now. :( - Ive had to re-render very big renders because of this bug. So annoying.
Also there is a similar render fragment where you get a yellow wash with the Red and Blue bits.
yeah same issue
just switch all your lighting over to deep shadow lights and you will be ok
This isn't a DAZ Bug. It's a known 3Delight (renderman) "issue." Another option that usually works is to adjust your camera angle by a very small amount (usually 1 degree or less is sufficient).
I rarely find adjusting the camera works, I tried a render with deep shadow maps the other day and there were loads of the dots adjusting the camera did nothing I tried 2-3 times.
It has been a 3Delight issue for nigh on to forever...DAZ can't fix it, as it is something deep within the DSM algorithms and not a coding problem. Heck, if the 3DL developers haven't been able to actually fix it, after this long (at least 10 yrs), I'm pretty sure it can't be fixed. (Well, I do remember reading about one fix, but it pretty much doubles the memory used and triples the render time...which blows any advantage of using DSM in the first place).
The 'standard' workarounds are change the camera (could be render from a completely different one, the angle, the focal length, etc), change the lights (angle, etc...but not intensity, although sometimes shadow softness will have an impact), switch/change surface shaders and of course...switch to raytraced shadows.
It has been a 3Delight issue for nigh on to forever...DAZ can't fix it, as it is something deep within the DSM algorithms and not a coding problem. Heck, if the 3DL developers haven't been able to actually fix it, after this long (at least 10 yrs), I'm pretty sure it can't be fixed. (Well, I do remember reading about one fix, but it pretty much doubles the memory used and triples the render time...which blows any advantage of using DSM in the first place).
The 'standard' workarounds are change the camera (could be render from a completely different one, the angle, the focal length, etc), change the lights (angle, etc...but not intensity, although sometimes shadow softness will have an impact), switch/change surface shaders and of course...switch to raytraced shadows.
I only used deep shadow maps for ages its only recently that I've changed to raytraced and yet this problem has only occurred in DS 4 and up, I don't recall seeing it, especially as bad, in DS3 - strange.
The ONLY reason I use Deep Shadows is for Garibaldi hair... Raytrace just isn't the practical choice for rendering hair.
I found Render fragments were particularly notorious when rendering trans mapped trees in a jungle render I did. I had to keep re-rendering that one scene like 10 times. And even had to break up the scene into layers... Not just for daz to run smoother, but because of the blue yellow and red artifacts. I'm not exaggerating
At least 3delight is constantly updating though. Every Daz beta seems to have an updated 3delight.
I only use raytraced lights, and I am getting the spots and occasional black or white out of things in the scene.