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But the WOOD TEXTURE!!! How did you make that from nothing? Some sort of noise as a starting point? Then directional blur? I have no idea! But if I tried I bet it wouldn't look photorealistic! :)

Render>Fibres

tweaking opacity and adding noise and more tweaks. Colour overlays. Mostly trial and error from previous trial and error.

blank sheet of paper A4 ratio desk vert lined.jpg

That's amazing! 😃