UPBGE is very active - a fork of bge with enchanced phyiscs, rendering, and workflow additions. enchanced mesh editing w/ BVH_Tree_From_KX_MeshProxy() https://github.com/UPBGE
Setting the light in the Unreal Engine 4.20 is quite good, with many different types of lighting duck life
Stylish Water Shader 2.0 for Unity with many great features, I enjoyed this new application run 3
Check out an astonishing collection of free materials for Blender by Michael Novelo. The collection features all kinds of surfaces for you to build various projects.
The site features tons of procedural and texture-based materials. Each file includes a description of how to use a material. The textures are usually seamless and available with a minimum resolution of 1024x1024px.
The collection has different kinds of materials, like concrete, fabric, fluid, some abstract ones, and many other.
You can find all the materials and learn more about the project here.