Frozen Stone Wall substance in both .sbs and .sbsar formats. This outputs standard metal-roughness PBR maps, including AO. The .sbs source file can be edited in Substance Designer 2018.3.1 or later.

This is fully procedural substance, no images were used. Snow has it's own separate sub-graph for easier organization.

As usual, if you have any question about this or my any other substances, please don't hesitate to email me: yaschan@gmail.com