ID 427135 - The Keyer clips values 1 and over in the Luminance key operation.

Problem summary
The Keyer clips values 1 and over in the Luminance key operation.

Customer reported version
nuke.12.0v3

Customer reported platform
10.14

Steps to reproduce

1) From Nuke, load footage with a brighter background.

2) Add a Keyer node.

3) In the Viewer, select to view the Alpha channel with A on the keyboard.

4) Adjust the Keyer C delimiter for values between .99 and 1 or 1.1.

5) Observe the output in the Viewer.

Expected behavior
The white value should not be clipped when valued 1 or more with the D delimiter larger than C.

Actual behavior
The Keyer clips values 1 or more in the C delimiter Luminance key operation.

Workaround
There is no available workaround at this time.

Reproduced by Support in
Nuke 12.1v1 - Windows 10, CentOS 7, macOS 10.14

Nuke 12.0v5 - Windows 10

Nuke 12.0v1 - Windows 10

Nuke 11.3v5 - Windows 10

Nuke 11.3v1 - Windows 10

Nuke 11.2v7 -  Windows 10

Nuke 11.2v1 - Windows 10

Nuke 11.1v1 - Windows 10

Nuke 11.0v1 - Windows 10

Nuke 10.5v1 - Windows 10

Nuke 10.0v1 - Windows 10

Nuke 9.0v1   - Windows 10

Nuke 8.0v1   - Windows 10, CentOS 7, macOS 10.13

Earliest version tested

Nuke 8.0v1 - This issue appears to be in all versions of the product