Macro tonal wash — slow periodic fBm tinting the base
colour by ±tonalStrength so the sheet doesn't read as a
flat solid.
Faint graph-paper grid — a thin line every
texture / gridRepeats pixels along both axes, mixed in
at gridStrength so it sits under the line work without
fighting it.
High-frequency fibres — periodic value-noise written
into a heightfield and run through heightToNormal.
Drafting paper. Three signal layers composed:
tonalStrengthso the sheet doesn't read as a flat solid.texture / gridRepeatspixels along both axes, mixed in atgridStrengthso it sits under the line work without fighting it.Output: opaque non-metal with high roughness.