Use Map Conver to provide conversion transformation for image-based lighting (IBL) and environment maps.
To access the 2D Transform menu, use:
Timeline, then use Batch FX (see Creating Batch FX).
Tools, then select from the menu (See Accessing Tools).
The Modular Keyer, then select a node from the Node bin.
This node accepts a front and matte clip, and outputs a result an outmatte.