Grease Pencil Generater Textures

This proposal is for adding the ability to use the generated textures from blender as input for the grease pencil texture in the materials. if the coordinates of the textures can be manipulated (in x,y,z would be even better because animating the z coordinate in a draw made in x and y the effects would be similar to a cloud evolution) some very cool animated effects could be made. The image in the post shows a rendered cloud texture loaded in the grease pencil material in a layer set to add, and masked be a shape made with an air brush with very low hardness. ^^