pfbreton

Here is how it works internally:

the mr Exposure control is based on documentation published by Kodak. It mimics the response curve of cameras by using the "right" weighting of ISO, Fstops and Shutter Speed.

However, if you look at the maths, it end up as a multiplier, which is your EV value.

As an extra color control layer, the other parameters (saturation, midtones, highlights) are applied on top of the calculated EV.

If all your lighting is within physical range (i/e/ correct photometric lighting with correct / typical light intensities), the EV used in the 3D world will match a Photographic workflow - its designed to be in line with the camera response, but to work correctly, your lighting need to be correct too.

Note: since its a 3ds Max exposure control plugin, there is no effect on the DOF and Motion Blur directly. Its purely affecting the color of the calculated pixel.

Hope this helps,