Simple ground material for a scenes with environment texture.
Material catches shadows and lights, no needs to composit render layers.
Ground material use the same environment texture as world, but ground material use “Reflection” texture coordinates with negative scale value for Z axis (-1).
Good only for flat surface. More info at blender.stackexchange.com
Sample BLEND file updated for 2.9
test-Ground_sunraise.blend (126.5 KB)
Texture was quite big to post, you can download it from http://hdrmaps.com/freebies/urban-exploring-interior
or use any of Greg’s awesome HDRi Heaven textures