Darn RedDots - I curse them!

[Morbid Angel]

verywell can be

[percydaman]

also do they go away if you turn off glossies in the global rollout? my bet its somewhere in there.

[Morbid Angel]

strange thing:
if i render a scene with quasi for both gi methods and get planty of red dots, but then i rendered same scene with irradience/lightcache and no red dots....

[Geddart]

This is really strange. I NEVER had those red dots...
I almost always use VrayMats (rarely touching ward), avoid Standard Materials when i can and keep my fingers from all the other materials that come with max. Especially those that involve max default raytracing stuff. (Raytrace, Architecture) I do that not because i always avoid getting dots but because i simply can achieve most things directly with the VrayMat.

You guys must use something i just don't.

It would be nice if Vlado could figure this out though. It seems many people have serious Problems with it.

[RErender]

Vlado's patch did not work?

[Morbid Angel]

no

[Mark David]

try rendering your scene with 1.46.13, see what appens.

I changed vray version from 13 to 15 in the middle of an image i was working and i start getting the same red dots. Probably material stuff either way so i switched back to 13 , and that after a hole day of trying, i found it was the only way to get rid of it. And they did go away.

Funny thing is that i switched again to 15 and start working on new scenes and the problem never got back.

I believe its something related to affect shadows in glass stuff, at least i thought till i saw your image, but in the image from galactus could be..

Regards

Mark

[RErender]

Not to question your modeling skills , but is there any wierd geometry? those blurry red spots on the long sides of thetwo lower cases look suspicious. Seems to occur in the same spot.

[Morbid Angel]

rerender, my mesh is clean. Red dots also appear on the plane below and box next to it.

[vlado]

Dmitry, do you get the spots on every frame or just some frames so that I can reproduce them here?

Best regards,
Vlado

[TishoChaos]

The cause of red dots could be different. The most frequent one that we found out until now is the Ward material, but lights can also produce unwanted red dots. It is very difficult to say here in the forum what is exactly the cause of a specific case, because the scene has to be examined and the problem has to be isolated and fixed. Please, if anyone has red dots in his scene, send the scene with an explanation of the problem on tisho@chaosgroup.com or vraysupports@chaosgroup.com. We give these cases priority because they jeopardize people' scenes and we give give patches that solve those problems until they dissapear at all in VRay.

[dimo]

We are also regularily haunted by red dots. And Nobody here could hunt it down yet. In Sequences it sometimes occurs in only 2 frames out of 1000. It often has to do something with reflections. But I also had some scenes where the new colorcorrect from Cuneyt Ozdas caused it. Checking the "Old File Compatibility Mode" in the ColorCorrect rollout stops this then. The ColorCorrect bug has nothing to do with vray.
I could easily reproduce this: Take a standard material and put a noise map in the diffuse slot. Then two colorcorrect nodes on top of the noise. The lower one with contrast 400 and the colorcorrect on top with gamma >1.

Standard material
diffuse:
colorcorrect (Gamma >1)
+--->colorcorrect(Contrast 400)
+----->Noise

But this looks a bit different than the red dots that occur in reflections.

Dieter

[paulison]

i remember red dots were being caused by vray sphere lights that are a long distance from the target? CAnt remember specifically but does changing the light stop the dot?

[gilicom]

Dmitry , How did you render this animation?
did you maka a gi solution or render it single frame?

[vlado]

I managed to reproduce that here and I'm looking into it right now.

Best regards,
Vlado