MMX Concrete for Iray contains 4 different types of concrete with various options.
Concrete 1 is light grey concrete tiled pattern, with and without dots. The tiling patterns are 1x1, 3x3, 5x5, 7x7 and 9x9.
Concrete 2 is a basic concrete. It has 3 different roughness patterns and 3 shades of grey.
Concrete 3 is a much rougher looking concrete that comes in 2 shades grey, each with 5 levels of dirt.
Concrete 4 is a tiled pattern with a lighter version showing a little dirt and grime and the darker aged version which is much dirtier in appearance. The tiling sets are 2x3, 3x6, 4x9, 5x12 and 6x15
The tiling for concrete 1 and 4 is done on the maps. This allows you to have a larger tiling pattern without suffering from the repeated look to the texture that often occurs with tiled images.
Additional presets included are height strength from 0 to 100 and tiling from 1 to 10.