bump, looking for a system for this too. There is this by a great developer:
UE 4.x-5.3: GitHub - chuklov/RenderTargetSerializer: Render Target Serializer for Unreal Engine 4.27 and above
UE 5.4 and above: GitHub - chuklov/RenderTargetSerializerUE5: Render Target Serializer Plugin for Unreal Engine 5.4
But the render target, when loaded has a slightly different color shade. I figure it won’t be a problem for you guys but it doesn’t work for me because I need to annotate the colors so i need the colors to be exactly the same