In this tutorial you will learn how to create game assets using photogrammetry. You will learn everything from how to capture your images, retopologizing and cleaning your data to creating your PBRs in Substance Painter before getting them into UE4.
Everything before getting it into the Unreal Engine is not engine specific and will work for Unity as well.
Want to learn how to create beautiful and awesome particle effects in Unreal Engine, check out this course from Plural Sight.
Learn how to plan your levels and game environments whit this highly rated book that teaches you the preproduction of level design and game environments.