Strange Speculator issue specially with cars

[OmanDesign]

Hello Guys

we face recently strange issues which is Strange specular

We get flickering specualrs and the support answer it was to

Go for vRaySky from environment copy it to materials
Turn on Specify sun node
and then turn on Sun Invisible

it worked for one project but on the other project it didn't

here is the video
https://www.dropbox.com/s/19xiv2p5oi...color.mp4?dl=0

and here is the scene
http://we.tl/8dKQAtSndA

its really annoying to see renders like that...
any one faced same issue ?

before it was only for cars now even with some materials , i'm littel bit thinking this is
serious bug , since i remember one project was not having any issue and later we faced the issue

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By the way this is using vray 3.1.01

i'm updating to 3.1.03 it seems this issue not there but can someone confirm...
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[tashko.zashev]

Hi,

I'm getting the same animation result with V-Ray 3.10.03. However, I see that Subpixel mapping is activated for this scene, but it will work better in combination with Clamp output in order to remove those very bright specular spots from the final render. According to my tests, if you use a clamp value between 3 and 5, the spots will disappear.

Another option is to remove the specular contribution from the Sun light and use another light source with bigger surface to produce only specular highlights.

[OmanDesign]

Thanks for fast reply

do you have specific details for the Light Source which we will use as specular highlights and recommended setting and type of lights

[tashko.zashev]

For an example, you can add an invisible Disc light in front of the sun light (Affect diffuse unchecked ) which has greater radius. Then you can adjust the multiplier according to your needs.