LumiBrush

Artists and developers can quickly create cinematic, stylized, or atmospheric lighting without complex lighting setups.

Inspired by lighting design techniques used in visual development and concept art, LumiBrush brings a painting & sprite based workflow to lighting in Unity.

How it works:

You control where light appears by painting and positioning sprites.

LumiBrush generates a dynamic light cookie for directional lights and spotlights.

The system works in two main ways:

• Light Sprites
• Light Painting.

Light Sprites:

• Light sprites can be moved, animated, or attached to objects
• They can use textures, colors and different blend modes
• Multiple sprites can be combined to build complex lighting shapes
• Lighting updates in real time

Light Painting:

• A painting surface is created (plane or generated mesh based on scene topology)
• Brush strokes paint vertex colors on the mesh
• You can paint with different colors and intensity (Colors doesn't work for Butil in RP)
• These vertex colors are rendered to the dynamic light cookie texture

Light Baking:

• Light baking can be done in Built in render pipeline and URP.
• Light baking doesn't support using different colors
• No support for light baing in HDRP right now.

Performance:

LumiBrush works by generating one dynamic light cookie texture for each light.

Runtime cost consists mainly of:

- A render pass that generates the cookie texture

- Scene objects used for light sprites or paint meshes

- No additional real-time lights are required.

Lumibsurh is perfect for:

• Atmospheric environments
• Stylized lighting
• Cinematic storytelling
• Rapid lighting iteration
• Prototyping scene mood and composition

Whether you are prototyping or polishing your final look, LumiBrush turns lighting into a fast, creative process instead of a technical chore.