Night
Dark background, bright hero lines, drifting up and to the left.
Transparent
Transparent background lets the element's own gradient show through.
Morph only
No drift: the terrain slowly reshapes in place.
Hairline
No hero lines, 0.6px strokes, high density.
Detailed
contour-style="detailed": finer ridges and small islands.
Warped
contour-style="warped": folded, flowing ridges.
Effects
Relief
contour-relief="1": hill shading lit from the top left.
Pointer
contour-pointer="1": hover or touch to push the lines away.
Boil
contour-boil="8": redrawn 8 times a second, like animated sketches.
Tools
Pen
contour-tool="pen": The default: clean, constant-width vector lines.
Pencil
contour-tool="pencil": Graphite: soft grainy edges and uneven pressure.
Charcoal
contour-tool="charcoal": Coarse, broken strokes with a faint smudge.
Ballpoint
contour-tool="ballpoint": Thin and steady, with the odd skip and blob.
Nib
contour-tool="nib": A 45° calligraphy nib: broad or hairline depending on direction.
Marker
contour-tool="marker": Translucent felt tip with darker wicked edges.
Brush
contour-tool="brush": Dry paintbrush: bristle streaks that break up as paint runs low.
Watercolour
contour-tool="watercolour": Soft wash with pigment pooling at the edges.
Drag the corner to resize: lines stay the same thickness and the terrain doesn't stretch.