Unreal Engine 5, from Epic Games, let’s go.
To start understanding how Unreal Engine, advanced real-time 3D creation tool works, follow this links, there you will find lots of information. And tutorials on how it is done. You can spend not just hours in this, days and even weeks.
Houdini Engine Plug-in.
Nanite, design at another level, “virtualized geometry system which uses a new internal mesh format and rendering technology to render pixel scale detail and high object counts. It intelligently does work on only the detail that can be perceived and no more. Nanite’s data format is also highly compressed, and supports fine-grained streaming with automatic level of detail.” A virtualized micro polygon geometry system, and a new Virtual Shadow Map system.