These are some hand made texture sets for use with the G'MIC Artistic Stylize filter.
There are 37 seamless textures in total, including a set of seamless textures for backgrounds (20) and 17 for use with the G'MIC Artistic Stylize (custom mode) filter.
(The pencil charcoal and pastel set are included with G'MIC for free from the 2.9.7 release.)
This pack also includes textures for Conte pencil and Carbon pencil as well as watercolour, wet pencil and wax crayon.
For information on how to use them please read these articles:
37 png. seamless textures