A NeoForge content mod for Minecraft 1.21.1, built on top of the Painter canvas API. Fresco adds a set of brush-like tools — paintbrushes, stamps, spray cans, and cloths — that let players paint, copy, spray, and blend pixels on any block surface.

• Minecraft 1.21.1
• NeoForge 21.1.228+
• Painter 0.5.6.9beta+ (bundled as dependency)

Pick a color from the world. With the palette in your offhand, press the pick-key to grab the pixel color under your crosshair. The palette stores a single ARGB color and can be used by other tools as a color source.

Recipe: 7 dyes (white/black/red/yellow/blue/brown/green) + any sign → Palette

A circular brush that paints with the color from your offhand item:

• Dye items → that dye's color
• Ink Sac → black
• Palette → the palette's stored color
• Other / empty → white

Shift + right-click opens a config screen where you can adjust brush size, opacity, and blend mode (overwrite / add / multiply / erase).

Recipe: stick + ink sac + string×2 + button + feather → Custom Paintbrush

Inherits the Custom Paintbrush's circular pattern and config screen, but additionally writes a glow effect layer to every painted pixel. The glow pipeline (BlendFunction → CanvasImageProvider → CanvasPixelRenderer) renders with full brightness, producing an emissive night-glow effect.

Recipe: stick + glow ink sac + string×2 + button + feather → Glow Paintbrush

A circular spray brush with adjustable feather, density (random pixel skipping), opacity, and size. Blend mode is fixed to add. The spray size increases and opacity decreases based on distance from the target (1 block → ×1.0 size, 4 blocks → ×1.5 size / ×0.5 opacity).

Right-click with a dye in your offhand to tint the spray can. When tinted, density-skipped pixels are filled with a brightness-varied version of the tint color instead of being empty. The tinted dye is stored in the spray can's internal container and can be retrieved.

Shift + right-click opens the config screen.

Recipe: iron nugget + button / paper + glass bottle + paper / iron ingot → Spray Can

Copies pixel data from a canvas face and replaces it elsewhere. Two modes, toggled by shift + right-click on air:

• Default — copies only the canvas pixel data
• Background — captures the block face texture + overlays canvas pixels

Shift + right-click a block to store pixels. The stored face is preserved (non-destructive) and can be placed multiple times. Craft two stamps together to clear stored data.

Recipe: stick + iron ingot×2 + plank + paper → Stamp

A blending tool that reads surrounding canvas pixels, computes a blurred composite matrix, and paints the averaged result back. As you paint, the cloth accumulates tint from the canvas pixels (1% blend weight per stroke, up to 100% saturation). The accumulated tint is injected back into the blurred output, creating a color-mixing effect.

Shift + right-click on air resets the tint. Shift + right-click on a block opens the config screen (size, opacity, feather). The cloth texture changes based on saturation level (clean → cloth_30 → cloth_60 → cloth_dirty).

Recipe: white wool×3 → Cloth

• Painter (Pigmentum) — the underlying canvas API that enables painting on block surfaces

MIT License.