I need a tool which enables me to create contribution maps with a name of my choice and adding opacity pass to the respective contribution map.

second,
I need a script which enables me to add mi label to selected objects with value 1.

And last one, I'm using a script to add decay rate on my lights but is giving me an error.
// Error: Line 12:32: Illegal operation "+" on data of type string []. //


Please help me...

Thanks a lot