Have any one seen this before? I certainly havent…I was working on a scene, set it up rendered it like 1000 times, when i finished setup, i did animation on the character, then when i tried rendering, the render frame screen went black, and all tho it says rendering in the current task, nothings showing up, no buckets nothing just black…but if you stop the render the fram fades on with weird artifacts, and if you let the frame render thru it starts to render it again as if it was rendering animation. If I turn on vray fram buffer buckets show up but the same problem presists…im lost i havent seen anything like it, when trying to merge to new scene (which did render before) same thing occurs.
Im using vray 1.457
heh
mmm odd … did you try swichting to scanline then back to vray and set it up again ?.. i find sometimes that help if you reset the renderer.
hahahaha you wont believe it, I forgot to turn off multipass effect in my camera when I was doing animation previews I turned it on for preview mo-blur, then forgot to turn it off…hahaha
all solved 
DOH …easily done 
hehe. easily enough recognised. ive done that by accident alot myself