Maya render passes

HEY

I AM NEW TO THIS FORUM

PLEASE ANY ONE CAN EXPLAIN WHICH ARE IMPORTANT RENDER PASSES IN MAYA SCANLINE AND MENTAL REY.
I KNOW THAT IN MENTAL RAY RENDER GLOBES WE  HAVE READY PASSES OPTION
BUT HOW TO GET CUSTOME PASSES

I AM NEW TO MAYA LIGHTING
OR IS THERE ANY TUTS WHICH CAN EXPLAIN THEM IN DETAL

THNX

Make a custom pass in the render globals with appropriate name, give it a name. Attach to rendering.

Make a wireToXXXBuffer node where XXX is the name of the buffer type your after. Attach to your shader.

Render

PS: dont shout its rude.