Thanks for your comments Pascal. the wonders of my i7 machine are churning out the render above in about 1min20s

he he really glad I spent the extra at the time for the 8 threads. Slows down to about 8 mins with hair though even on the lowest settings

. Any way working on the spec WIP
I spent a lot of time on the weekend trying to sort out the pesky hair, tweaking and prodding guide hairs around. Got it all sorted with my lowres body mesh, but horrors of horrors when i tried a render with Ash's multitile script with my .exr displacement tiles, the mesh seemed to have bloated a little bit so I investigated by adding my hires mesh from mudbox and that looked all right. I ended up putting a multiply/divide node in the displacement pathway and dividing the output into the luminance node by 6, seems to work now. I have no idea really but I figured that all the luminance inputs add up to six

I tried with dividing by 2 first off because the inputs were 2 but that didnt work completely. The bloatings probably due to some other reason to do with Uv smoothing between mudbox and maya but I dont understand that too well. Im not too worried as I dont seem to have lost any detail on what is a reasonably low detail mesh and im viewing it from a whole body shot not for closeups. I checked with a full body render and i cant see any detail loss anyway. I may use the hires mesh in the final shots anyway. I thought someone might be interested in this if they are using Ashs's script and Mental Ray and know what i stuffed up