Weird Flicker in shadows for the first time V-ray 3.0 !

i was checking the website www.workshop.mintviz.com/tutorials/flick...nimation-using-vray/ and i have an issue that i did not find the solution when rendering with vray animation:
i used the fly anim. with moving objects preset in solid rocks 1.6 latest...

i checked the use camera path and everything good

i have Moving objects with camera movement and i have flickering in the shadows (find attached the image) i tried to solve it and i found that the flicker is nearly gone but the shadows are low quality but unstable check the image…
what should i do to have a good looking shadows? other than increasing the subdivisions of the shadows in the lights that i already did..

also i have a vrayHDRI in the scene with vraylight too...

thank you

Yes I mean, I already used The MOAWiz (Anim:full) to render my animation, but the problem as i said, the shadows are low quality... like in the image attached, what should i do to have good shadows not that grainy?

i think this is a common problem in vray 3.0

thank you subburb