G'MIC auto-illuminate 2d shape
Here I show some uses of the G'MIC filter 'Light & shadows / illuminate 2d shape', to add light shades to a drawing of a hand.
These methods are tried:
1. Fully automatic. Very quick, but the result looks a bit inflated.
2. With guide strokes : much better, but we want a bit more control on certain parts of the drawing.
3. Bump map modification : We let G'MIC output first an estimated bump-map, that we modify a bit, before rendering the illumination layer again.
This shows various use cases of this single filter