ID 426583 - A black screen is given when viewing/rendering the LensDistortion node with the CPU.

Problem summary
A black screen is given when viewing/rendering the LensDistortion node with the CPU.

Customer reported version
nuke.12.0v5

Customer reported platform
windows10

Steps to reproduce

1) In Nuke, create a Checkerboard node.

2) Create a LensDistortion node attached to the Checkerboard.

3) In the Properties bin of the LensDistortion node, disable the 'use GPU if available' checkbox.

4) Select Detect and then Solve.

Expected behavior

The checkerboard should be visible with the lens distortion applied.

Actual behavior
The render was black. This can also be caused by adjusting the addPixel knob to a value greater than 0 when GPU is disabled and viewing the node.

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, CentOS 7, macOS 10.14

Unable to reproduce bug in:
Nuke 11.3v6 - Windows 10, CentOS 7, macOS 10.14

Earliest version tested
Nuke 11.3v6 - This issue doesn't appear in this version and has regressed