V-ray Next 4.30.02 - Extreme "dancing" white pixels on any material at a distance with glossy reflections

[Joelaff]

Are you making a still or an animation? You could also try it without the lock nosie pattern, but then average a bunch of frame together. Of course that increases the render time linearly.

[Joelaff]

Just had to check this, because I did not think of it: Indeed it does!
Side-effect is that you get a noise pattern that looks like hovering over the image...

Yeah, if the sampling is high enough, and the noise is minimized that goes away (or through multi frame denoising, which is what the lock noise pattern is so good for).

I prefer a dancing noise look, but without the dancing highlights!

[kosso_olli]

I wonder if Lock Noise Pattern would at least keep them consistent.

Just had to check this, because I did not think of it: Indeed it does!
Side-effect is that you get a noise pattern that looks like hovering over the image...

EDIT: It does only work if the camera is static. As soon as it moved, you get randomly placed hightlights again.

[Joelaff]

I wonder if Lock Noise Pattern would at least keep them consistent.

We still run into this a lot. It always always ends up being a second light for the highlights. Also, been having much better results with a distant regular Vraylight vs. a VraySun. Not quite as accurate, but tends to work much better. A vignette as a light texture map also seems to help.

Would really like to see a fix like Corona has.

[kosso_olli]

Well, the carpaint is a Vrscan, but it happens with all materials having glossy reflections.
The "solution" to use two different suns was not tested, as this just does not feel right or physically plausible.

[Vizioen]

I also have this problem with a default Vraycarpaintmtl2 (just colors changed and I even disabled the speckles because I though this was the issue. In my case it's animation though, haven't tried it with still shots.

When I do animated aerial shots, the cars flicker like a discolight. I've learned to live with it, but it sucks. LC on animation settings, and default vray settings basically.

Is it still the way to go with 2 VraySuns, and big size for specular? It's a bit cumbersome. Latest Vray btw.

[kosso_olli]

Hey guys,
sadly I have the same problem here. But in our case, it is even more weird, because the scene is not animated. No moving geometry, cameras or lights.
Yet rendering some consecutive frames yields flickering highlights. All the frames were rendered on the same machine, to ensure it is not caused by changing hardware setups. It seems catching the little highlights is totally random.
We tried a number of things: Raising Min and Max AA (Min 4, Max as high as 256), lowering the glossiness of the car paint, making the sun size bigger, changing the bucket size, setting AA filter to Cubic and resetting V-Ray. Nothing helped.

Max 2023, V-Ray 6.00.20

[jeremiah_jones]

The readiness for primetime is for Vlado to decide.
I'd rather not talk in his stead, but i *assume* he'd like to make the feature a bit more complete, and able to deal with any high contrast situation.
For now, either use the provided build, or any of the traditional ameliorating methods (f.e. lower gloss and lower reflectivity on distant parts.).

Thanks. I will test that build on my scene and report back what results I get.

[^Lele^]

The readiness for primetime is for Vlado to decide.
I'd rather not talk in his stead, but i *assume* he'd like to make the feature a bit more complete, and able to deal with any high contrast situation.
For now, either use the provided build, or any of the traditional ameliorating methods (f.e. lower gloss and lower reflectivity on distant parts.).

[Joelaff]

The build's still there.

https://forums.chaosgroup.com/forum/...15#post1079115

Yeah, but I think we'd all like to see it in the main stable branch of VRay 5 sooner rather than later.

[^Lele^]

The build's still there.

https://forums.chaosgroup.com/forum/...15#post1079115

[Joelaff]

This is still a common issue. Would love to see some progress on this.

I thought it was in an internal build months ago? ^Lele^ ?

[jeremiah_jones]

I'm using Area as my AA filter with default of 1.5. Tried increasing to 3 but now it is much blurrier and the spots are still there.

[jeremiah_jones]

lassysilvestre


The option is deprecated with the implementation of the Adaptive Lights. Try increasing the AA filter's (V-Ray>Image filter) size or/and add slightly effective lens effects (VFB2>Lens Effects).

The issue that I have is that I have white spots coming from the HDRI. I'm using a dome light with an HDRI to light my scene. The only thing that seems to get rid of them is using older settings that still have clamp output turned on and then turning on sub pixel. I will give what you said a shot but are there other solutions for this issue?

[hermit.crab]

lassysilvestre

I'm looking for the same thing here. How do I access this maxscript so I can see the clamp output settings?

The option is deprecated with the implementation of the Adaptive Lights. Try increasing the AA filter's (V-Ray>Image filter) size or/and add slightly effective lens effects (VFB2>Lens Effects).