Not sure if this helps but i am also having some issues with the memory leak and it jumps from 5-10 MB’s every time I run and close the scene. With a 20-40 difference in running but when it is stopped it adds that 5-10 mb to the total use. I have to restart Unreal to set it back to the initial ram it was before. Using a community project. [Community Project] WIP Weather & Ocean Water Shader - Game Development - Unreal Engine Forums And my own BP’s that I had before with no issues from 4.6