Reflection Hell

[glorybound]

My last three exterior jobs, I think since the latest V-Ray, my reflections have been unusable. I am using an HDRI and V-Ray Sun.

[vlado]

You mean the VRayReflection render element? Can you show me what the main RGB looks like?

Best regards,
Vlado

[glorybound]

Yes, of course. This is straight out of the VFB.

[joconnell]

I take it the reflection element you've posted above is after you've boosted it up a lot in post? Or is that the raw reflection pass? It looks like the reflection contributes very little those pixels so vray isn't going to make much effort there. If you have a look at your reflection filter element also, it's probably very very dark in those areas. Vray is going to sample based on the final RGB only so it won't go further than it needs to. What's your noise threshold in your aa settings?

[Buck]

I take it the reflection element you've posted above is after you've boosted it up a lot in post? Or is that the raw reflection pass? It looks like the reflection contributes very little those pixels so vray isn't going to make much effort there. If you have a look at your reflection filter element also, it's probably very very dark in those areas. Vray is going to sample based on the final RGB only so it won't go further than it needs to. What's your noise threshold in your aa settings?

does kinda look like a raw reflection pass

[glorybound]

No, that is a screen grab of the VFB and not zoomed in. The RAW Reflection is just as bad.

[glorybound]

Here are the reflection and raw reflections saved from the VFB. Above was a screengrab.

[glorybound]

The light select of the HDRI is also not usable

[glorybound]

All my V-Ray settings are the default and I am using bucket rendering.

[Morbid Angel]

I bet there is some kind of light or something causing this...

[thomes]

denoised renderelement ?

[^Lele^]

even knowing which engine you're using would be beneficial.
CPU or GPU?
Could we get the scene?

[Vizioen]

I bet there is some kind of light or something causing this...

Second, I've never seen a noisy element like this. You should try and render only with a vray sun, and see if it's still like that.

[kosso_olli]

The light select of the HDRI is also not usable

Stuff like thing often happens when there are some old and unsupported standard materials or maps like raytrace are hidden in the scene.
My bet is it doesn't happen with a semimatte grey override material.

[glorybound]

CPU and I"ll try just V-Ray Sun/Sky and a material override.