Can imagers write to AOV float data type?

[zjqj]

When I use a colourcorrect imager with layer selection set to Z, and my Z AOV data type set to float (default) the resulting EXR (using merged AOVs) contains unaffected Z channel - i.e. the imager doesn't do anything.

If I set my Z AOV data type to RGB the resulting EXR Z channel is affected, which is the result I want, but when using the RGB method the EXR contains z.r, z.g, z.b but I only want a single channel for Z (which I get when it's set to float)

Can I make the imager affect an AOV that uses data type float?

or/and

Can I make the driver export a single channel for depth when the AOV uses data type: float?

[zjqj]

A more simple version of what I'm asking is:

How can I adjust the value of the Z AOV (float) at rendertime using an absolute value, such as 0.01?

[Stephen.Blair · Accepted solution]

Imagers like color correct support RGB and RGBA inputs only.