ID 365647 - The Convolve node adds unwanted noise when the image input's color channels include large values.

Problem summary:
The Convolve node adds unwanted noise when the image input's color channels include large values.

Customer reported version:
nuke.11.2v3

Customer reported platform:

Ubuntu

Steps to reproduce:

1) From Nuke, create a Convolve node in the Node Graph.

2) Create a Constant and Rectangle node linked together, and attach it to the Filter of the Convolve node.

3) Make another Constant node and create an additional Rectangle node.

4) Attach the nodes from step 3 to the image input of the Convolve node.

5) Double-click the Rectangle node to open the Properties bin, and select the Color tab.

6) Edit the Color value to a large number (1000000).

7) Set the Viewer to the Convolve node and view the output.

Workaround:
Use a Clamp node on the image input to devalue the extreme color channel values.

Reproduced by Support in:

Nuke 11.2v3 - Windows 10, CentOS 7, macOS 10.13 High Sierra

Nuke 11.2v1 - Windows 10

Nuke 11.1v6 - Windows 10

Nuke 11.1v1 - Windows 10

Nuke 11.0v4 - Windows 10

Nuke 11.0v1 - Windows 10

Nuke 10.5v7 - Windows 10

Nuke 10.5v1 - Windows 10

Nuke 10.0v6 - Windows 10

Nuke 10.0v1 - Windows 10

Nuke 9.0v9 - Windows 10

Nuke 9.0v1 - Windows 10

Nuke 8.0v7 - Windows 10

Nuke 8.0v1 - Windows 10

Nuke 7.0v10 - Windows 10, CentOS 7, macOS 10.13 High Sierra

Earliest version tested:

Nuke 7.0v10 - This issue appears to be in all versions of the product


Expected behavior:

The Convolve node should appear without artifacts or additional noise from the image input when large color values are present.

Actual behavior:

The image input for the Convolve node includes additional unwanted artifacting or noise when the color values are set to an extreme number.