Typical noise from Blurred Reflection but not mapped properly on surface when moving?

[Kinetic99]

Hello and thanks for your time,

I have an silvery reflective object but with a with Refl. Glossiness down to 0.825 to help blur it. I'm also using a grey scale map of a fine noise texture in the same slot to help control the blurred effect on the surface. It is also properly mapped on the surface of the geometry using Explicit.

It looks good.

But when I animated it (the object was simply rotating and the camera was fixed), the blurred reflection speckles of light and dark does not follow the movement of the object. It runs past the object as if the lighting was mapped on it like "Object Planar". It the speckles just sort of run across the surface of the geometry; as if it was following the camera, and not fixed onto the object properly.

I've tried many, many options from sampling, light cache tweaks, all the checks- on and off, higher values, lower values and nothing removes this "speckle movement".

The overall material is nice and I don't have a problem with the noise necessarily but more like the way the blurred reflection moves with the camera.

Any thoughts or ideas?

K

[tashko.zashev]

Hi,

Is it possible to attach some examples or animated gif file ?
Is your geometry animated?

[Kinetic99]

Hi,

Is it possible to attach some examples or animated gif file ?
Is your geometry animated?

thanks for the reply. Unfortunately I cant since its sort of a propriety object and because of work circumstances.
But here is a clue I found: When "time independant" in checked on in DMC sampler, I get this affect, but when it is clicked off I get the same noise specks but they are random and "dancing around".

The object is rotating (using a linked dummy) but the camera is still...

[Kinetic99]

thanks for the reply. Unfortunately I cant since its sort of a propriety object and because of work circumstances.
But here is a clue I found: When "time independant" in checked on in DMC sampler, I get this affect, but when it is clicked off I get the same noise specks but they are random and "dancing around".

The object is rotating (using a linked dummy) but the camera is still...

I figured it out: it was the moving object that that was messing with "mapping" of the blurry reflection and lighting. When I animated using a moving camera instead, everything was fixed and more realisitic.
But why? If I have a moving object (using a dummy) or a camera, It should still yield the same results. When the object is animated, its as if the blurry reflection-lighting is moving around in object space instead of being fixed down. thoughts?
Mabye there is a setting to remove this artifact when I animate the object?

[tashko.zashev]

It is difficult to me to understand what exactly is the issue in this setup without any rendering examples or a scene file. Is there any chance to send us something to our support mail? You can remove or replace any confidential data for that scene, if possible. Thank you.

[Kinetic99]

It is difficult to me to understand what exactly is the issue in this setup without any rendering examples or a scene file. Is there any chance to send us something to our support mail? You can remove or replace any confidential data for that scene, if possible. Thank you.

thanks, If I get repeated problems with this, then I definitely will make a safe scene sample and send it off to you.
K

[^Lele^]

it sounds to me like your mapping is set to world_XYZ, which would make your object swim though the texture if moved.
VRay has nothing to do with that.