Virtual Camera path switching | Forum

Virtual Camera path switching issue

Hi guys, I met an issue, while in Virtual Camera, when I switch a camera path as below Virtual Camera path switching issue

I've got a ragged frame(53:05) between 2 shots(53:04 and 53:06), like below:

Virtual Camera path switching issue

Is there any hints about this, and any solution?

Simon Cai

Eifert@Aximmetry

Hi Simon,

The issue with the ragged frame is likely due to the Motion Blur setting being enabled in your Unreal project. However, this shouldn't occur even with Motion Blur enabled because the camera compound in Aximmetry is designed to report Virtual Camera path changes to Unreal and it disables Motion Blur for that frame.

This issue has been reported by others in the forum and I attempted to replicate this problem multiple times but was unsuccessful. To help us diagnose the issue, please follow these steps:
Add a Logical Peeker and a Collection Logical module.
Connect the Collection Logical module to the B1 Data pin and set its Key pin to "Camera Cut."
By setting it up this way, you should see the Logical Peeker's preview turning on for a frame when you switch the camera path:

If this does not happen, there may be an issue with the camera compound. For example, you might be using an older version with known bugs that have since been resolved.

If the Logical Peeker does activate during the camera path switch, then there is likely a setting within your Unreal project that is overriding Unreal for Aximmetry's solution to disable Motion Blur. In this case, it would be helpful if you could share the project settings files or the entire project with us by writing to sales@aximmetry.com and mentioning this forum post.

Otherwise, simply turning off Motion Blur in the Unreal Editor's Project Settings, should fix the issue.

Warmest regards,

Simon Cai

Hi Eifert

Thanks for your advice, I've tried, the camera cut signal has been activated by Logical Peeker during the camera path switch. I've sent the unreal project and the aximmetry comp to the email provided. Please help to check, thank you very much!

JohanF

@Eifert: Motion blur is an integral part of photorealistic rendering and should never be turned off. Without motion blur, the motion will look a lot less smooth.

Eifert@Aximmetry

Hi Simon,

We checked your project with Aximmetry 2025.1.0 and couldn't recreate the issue. However, we noticed that the compound you are using was created with Aximmetry 2023.3.2. Since then, many fixes have been implemented that might be related to your issue. Therefore, we recommend upgrading to the latest version of Aximmetry (2025.1.0).

Warmest regards,

Eifert@Aximmetry

Hi Johan,

For example, when you switch cameras, shouldn't the motion blur be turned off? After all, you're using a new camera and not moving the same camera to a new position.

In the upcoming major version of Aximmetry, the issue with the Camera Cut being triggered when using a smooth path, or when the resulting change in the camera's position is very small, will be addressed. This issue was originally discussed here first: https://my.aximmetry.com/post/2910-shadowreflection-glitch-with-path-cut

Warmest regards,

JohanF

Yes, it should definitely be temporarily cut out in that case. I was just objecting to the suggestion that turning it off completely would be a viable workaround.

Simon Cai

@Eifert, Thanks for your advice, after upgrade to 2025.1, problem resolved.

Virtual Camera path switching issue

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