Vertical lines in render?

What could be causing these vertical lines that only show up in the render (I have the render overlaying the same frame in iClone)? The render is blurry due to Motion Blur. They only occur when the character with the yellow shirt walks by.

Any ideas or suggestions?

Hi gordryd,

Could you please let us know the clothing name of the character wearing the yellow shirt, if this outfit is from Reallusion content?

We would like to check whether there are any potential issues that can be identified directly from the content itself.
If we are unable to find anything from the content side, we may need to ask you to provide the project file and submit a report via the Feedback Tracker for further investigation.

The outfit is part of the ActorCore character, “Business-F-0020” from the Urban Crowd bundle (I changed outfit colors using the provided MaterialPlus files). I also see these lines on another ActorCore character in the same scene, “Party-F-0009” from the Crowd Set bundle. The lines only seem to appear when the character passes the camera at a certain angle (directly from the side), and only when rendered. It doesn’t seem related to clipping planes, as the 2 characters pass the camera at different distances. Thanks.

Seems to be an artifact of Motion Blur. Rendering a still image on that frame does not show the lines, so I disabled Motion Blur and rendered the video and the lines are gone. So maybe you need to look at how Motion Blur handles the render when objects are close to the camera.

Hi gordryd,

We have tested the character and materials you mentioned and also enabled Motion Blur, but unfortunately we were unable to reproduce the issue on our side.

Would it be possible for you to provide the project file by sending it to my email crystalpan@reallusion.com ? I would like to try reproducing the issue directly from your project and discuss possible fixes with our team.

Thank you for your assistance.

Since the file size is large (>500MB) I have sent the project using WeTransfer. I think you typed your email address incorrectly above (reallusion is spelled wrong) so I corrected it when I sent

Hi gordryd,

We have verified your files and are able to reproduce the vertical lines in the render issue you are currently experiencing. Our team is now investigating the root cause, and we will keep you informed as soon as we have any further updates.

Thank you for providing the files and correct my spelling mistakes!