What are these red triangle icon on the corner of these particle assets?

I imported the Infinity Blade: Grasslands asset from the marketplace to UE4.19Preview4 and there are these red triangle icons on the corner of every particle assets

Anyone know what they mean?

Hello Feureau,

The Red Triangle just means that the VFX Thumbnail in the Content Browser does not match the Effect anymore. It will remain until you update the VFX Thumbnail and will reappear if you edit the effect again.

OK, this red corner looks much more important, than it actually is! I thought - may be there is some critical errors in my particles :slight_smile: