Hello, basicly any decals and physics actors that are spawned during runtime, when ever i spawn them after for example explosions, or in other situations, will disappear after 15 secs or so. And Im sure there must be some sort of a switch becouse it looks like a optimization of some kind.
Please give a hint on how to fight this!
How many decals are you spawning at once and what is your system specs?
My system: AMD FX 9730 (8core) 32Gb Ram, Radeon R9 290, windows 7 64bit. I’ll post a video example! One small remark is that I know that the spawned physics actors have hight polycount, ill fix that.
Hmm, then it is an issue with how UE4 handles Decals i believe. Check out this post: https://answers.unrealengine.com/questions/49178/decal-management.html
Thank you Jacky, but im not sure how to implement that using Blueprints 
heres the video (it is shown in the end of the video) - YouTube
Found how to beat this, Ive created a Blueprint Actor with the decal inside and instead of spawning decals i spawn actor and specify my Decal Blueprint and it will not be deleted over time unless specified in its life span!