Strange single frame glitches of objects in my sequence.

Hey,

I have a really strange issue I cannot figure out. Any help would be greatly appreciated, I’m very new to unreal coming from Blender, I am using Unreal in this instance for the quick render times and Lumen.

The project:

Using Lumen

It’s a number of cameras parented to an actor that is rotating around a huge planet object. I have 2 actors controlling this, one for an angle offset, and one for the orbit pattern around the planet. The animations 5 mins long at 30fps.

I have placed space ship elements within view of some of the cameras that show what a person inside the ship might see as they are orbiting the planet. These are parented to the same actors controlling the movement of the cameras.

The issue I’m getting is occasionally, a frame will seemingly ‘glitch’ out for all the cameras, where the various ship objects distort massively and then the next frame return to the expected behaviour.

What’s odd is this can be seen both in the viewport when playing my main sequence, and in the exported render queue videos, so it’s not a glitch in rendering as i first suspected.

Some things I’ve tried:

Turning off elements in the viewport to see if something strange was going on with lighting or post process or anything like that.

I’ve replaced my objects with simple shapes like a cylinder etc to see if it was an issue with the imported ship meshes I have used.

Here’s a short vid showing the issue, here you can see in the 2 cameras i’ve pinned in the viewport, the strage glitch I’m talking about.

Anyway any help would be great thanks!

Is it always happening on exactly the same frame?

I’ve seen that exact thing happen before relating to motion blur. Might be worth testing that by turning motion blur off to see if you still have that ‘glitch’ look. If it is indeed motion blur, then doing some testing to make sure that the object isn’t having some erroneous movements in between those frames (like… I dunno… rotation values flipping due to rotation order… something like that?)