Auto Exposure tool

This tool computes the correct camera shutter speed to obtain an accurate exposure for the final image, just like a real camera using "auto" program.

In this interior scene example, standard V-Ray Sun/Sky was used (with default settings).
A default V-Ray physical camera was used with settings: F 8, Shutter speed 200, ISO 100.

Before : error 43% Render is too dark. (Shutter speed was 1/200s)	After : error 1% Much better ! (New Shutter speed is 1/43s)