Dynamic material instance crashes unreal

Development Cinematics & Media
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1

Heya,
I recently had a bunch of crashes and it took a while to troubleshoot.
The issue was that I added some blend material on an asset, added the asset to the sequencer and animated some parameters.
Then I copied the asset to another level and now it crashed unreal, everytime I clicked on it.
Turns out it was because it still had the dynamic material instance assigned that got created when I added it to the sequencer in the other level.
It would also click in that level, if I clicked on it WITHOUT having the sequence open.
I couldn´t even delete the dynamic material instance without crashing it.
The workaround was to add it to the sequencer, animate it, but than hit “revert” on the dynamic material instance immediately.
So now, the dynamic material instance is only on the asset, when I open that sequence, otherwise it reverts to the original.

Now.

  1. Is that normal behaviour and if so, how am I supposed to deal with it? Seems counterintuitive that I´d have to do the “revert” dance everytime and when I don´t it´´ll crash…
  2. If its the specific master material parent of the material instance, any idea where I should start troubleshooting? Because its rather complex and going one node at a time would take forever…
2

Kindly bumping this…

haven´t really gotten much further with it.
Just trying to avoid reusing any material instance that has already been animated somewhere.
But recently had another bad day of troubleshooting trying to figure out why Unreal kept crashing.

I´m also not good with derived data cash…I´ve only once manually created it and we´ve got a bit of a complicated setup using perforce, where we import+ most of our master materials from a template project.

So I´m not sure if thats maybe something to look into when dealing with this.

Or if I should use a different workflow for animating materials in sequencer alltogether.
Right now all I do is:

  1. Add the mesh with the material to the sequencer
    2.Add the material slot parameters I wanna animate.
  2. Animate the material parameters.

I know I could also click on “create dynamic material” first, but I´m not sure what the difference is.
Fact is: The dynamic material doesn´t “live” anywhere, its gotta be embedded somwhere in the sequence or the map being rendered, as I can´t brows to it in the details panel, I can only go up the hierarchy then and thus get to the original material.

3

Sweet.
I just clicked on “Create dynamic material” and Unreal crashed right away…