Ganesh Lakshmigandan

Hi Rob,
Thanks for looking into this. Yes i agree The cache LOP method works on in this simple scenario.
I had some unpredictable cam mblur with this method on much heavier scene .
i was instancing lights and env geo based on cam frustum and on the frame they appear in the frustum the camera motion blur on those elements(lights and env) goes extreme.Reason for doing this is to keep the render times to a minimum.

So after playing with it for few days i found a temp solution, by time offsetting my camera frustum by 10+ frames ..so the env geos/lights gets created 10 frame before they appear in the frustum...and i'm getting the right cam mblur.

Not sure if this is right way to do it but it fixes the the problem...
But again Thanks for looking into this Rob.
Cheers,
Ganesh

I gave a try on both method but either of them works .r there any other way to approach it...

Thank

Andy_23
If you are using H19 you can try putting a Camera Edit LOP in your stream and set shutter:open shutter:close explicitly.

That helped me with an imported cam from an Alembic.

Thanks Andy. I will give a try