All the tricks and methods with which you’ve become familiar, like cascaded shadow maps, postprocess image adjustments, screen space reflections, and ambient occlusion, even basic 3D lighting and rendering techniques-these all fall under this umbrella of rasterized rendering.
What’s raster, you ask? Basically, raster rendering is everything you’ve been doing in the past 20-30 years to get image-based rendering to the screen. It’s flexible because you can mix raster and ray tracing rendering features together as you see fit, crafting the scene that you want, achieving the performance and quality that you want. Never have you had the ability to do things like shadows and reflections like this in real time. It’s powerful because of its accuracy and quality. Ray tracing in Unreal Engine 4 is a powerful and flexible lighting system.
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