rdg::graphPaper is a procedural graph paper texture created for 3ds Max. Its core is a pair of Gradient Ramps — one horizontal and one vertical — that define the tiling and line management of the material. Colors are set by either the top mix or the output map, depending on the material version.
The material is distributed as an .mzp package for 3ds Max. It was released as a proof-of-concept implementation tied to the developer's work on methods and tools for generating and manipulating procedural materials in 3ds Max, so it doubles as a practical example of that approach.
Because it is procedural, the graph paper pattern is defined through the ramp setup rather than a fixed bitmap. Those interested in the underlying reasoning can follow the developer's notes on procedural material generation and manipulation. The plugin is listed here as free.