velocity pass is wrong when i render multichanel EXR

[proundkontra]

Since i switched from after effects to nuke i render now multichanel exr out of vray for maya. but for some reason the velocity pass changed. when i render single chanel exr the veloxity pass has a gray background an blue, green and pink colors for the objects in motion. when i render in multi chanel exr thouhg, i become a black background with with green red yellow for the objects in motion.
any help?
thanks

[vlado]

When writing to a multi-channel .exr file, V-Ray writes the values as they are - positive or negative. When you write a single-channel file, V-Ray will add (0.5, 0.5, 0.5) to the values in order to keep them inside the black-white range.

Best regards,
Vlado

[proundkontra]

Thanks alot, that was helpful!
cheers