Region Blowup with MR Motion Blur problem

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Old 12 December 2012   #1
Region Blowup with MR Motion Blur problem

Hi and thanks for any advice I can get here.
Iím trying to do a series of region blowups with motion blur for a very large render. The final image will be 54,000 x 7,200 pixels (itís a 180ft wide wall image for an indoor go-kart track).

I can render it fine with MR motion blur using the render region setup but max will only allow me to go to 32,768 pixels wide, hence the need to use region blowup where I can put it together in post. Each blowup section will be 18,000 x 2400px - nine sections in total. When I render any of the blowup regions without the MR motion blur it works fine but as soon as I try it with the MR motion blur enabled it turns into a horrible smudgy mess. The blurring seems to be hugely over-exaggerated. I tried reducing the MR motion blur from 0.5 to 0.1 frames but it was still hugely exaggerated.

I canít understand why it works fine with render region (admittedly a bit smaller given the constraints) and it is incorrect using region blowup.
Has anyone come across this problem before or is it a known issue? Maybe there a setting that I am missing somewhere?

Any help would be very much appreciated.

Dell T7500 Workstation
Dual Xeon X5550 processors
24Gb Ram
Quadro FX3800
Win7 (64 bit)
3ds Max 2013 (64 bit)
 
Old 12 December 2012   #2
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