Vray diffuse colour at a distance help

[monkers]

Hi Guys,

So I'm playing around with mass rendering some heavy vray proxies. The proxy was originally exported from 3DS then re-textured in sketchup.

For some reason at a distance the maps with transparency are changing to the diffuse colour in the render below I changed the colour.

Any ideas on how to fix this, I probably just need some fresh eyes on it.

Thanks

[monkers]

bump... anyone?