Painting Engines

Engine Overview

OptiDraw ships with five distinct painting engines. Each targets a different data channel and workflow. They can be used independently or layered together on the same mesh.

Interactive Tag Inspector (7 items)View All Descriptions

Tag [A]

OptiDraw Engine Mode Selection: Vertex, Splat, and Texture Paint

AButton Draw ModeBShortcut TabCShortcut Preset FieldDEdit Shortcut ButtonEListening Shortcut ButtonFShortcut ToggleGEarly Mesh Information

AButton Draw Mode

1 / 7

Its not interactable when ther’s no object selected/the object that selected is not compatible with OptiDraw

Interactive Tag Inspector (20 items)View All Descriptions

Tag [A]

Brush Radius, Strength, Falloff Graph, and Presets

AButton Draw ModeBDraw Configuration TabCDebug TabDEarly Mesh InformationEBrush RadiusFBrush StrengthGFalloff GraphHQuick Falloff ButtonIBrush PreviewJDraw ModeKTarget MaterialsLSplat UV ChannelMNormal LimitNSeamless PaintOPaint ChannelsPPaint OperationsQDebug Toggle ButtonRDebug Shader KeywordSDebug Channel KeywordTDebug Vertex View Reference

AButton Draw Mode

1 / 20

It will interactable when the selected object is compatible with OptiDraw.

Interactive Tag Inspector (4 items)View All Descriptions

Tag [A]

Real-time Painting Viewport Interaction in Unity Scene View

AAnimation TabBAnimation Draw Mode ButtonCDrag & Drop Animation Clip Area,DDelete Animation Clip

AAnimation Tab

1 / 4

You can click that tab for expand or restrict.

Vertex Paint

Writes RGBA color data directly into mesh vertex color channels. Use this for ambient occlusion masks, wetness gradients, wind weights, or any effect driven by vertex color in your shader. Brush strokes are computed in Burst and stored per-vertex with smooth falloff.

Interactive Tag Inspector (2 items)View All Descriptions

Tag [A]

Real-time Vertex Color Viewport Painting

ATriangle Vertex GizmoBSquare Vertex Gizmo

ATriangle Vertex Gizmo

1 / 2

When the gizmo displays a triangle with a black dashed outline, it indicates that the Alpha Channel is currently INACTIVE. In this state, your painting operations will only affect the RGB channels of the vertex color.

Splat Paint

Paints layer blend weights into UV2/UV3 channels, similar to terrain splat maps. Up to 4 texture layers can be blended per mesh region. Ideal for surfaces that combine multiple PBR materials (dirt, moss, gravel, rock) without a separate mask texture.

Interactive Tag Inspector (2 items)View All Descriptions

Tag [A]

Multi-Texture Layer Splat Blending on Complex Mesh Surface

ASplat Black Dashed Outline GizmoBSplat White Dashed Outline Gizmo

ASplat Black Dashed Outline Gizmo

1 / 2

When the gizmo displays a black dashed outline, it indicates that the Alpha Channel is currently INACTIVE. In this state, your painting operations will only affect the RGB channels of the vertex color.

UV-Based Paint (Texture Paint)

Projects brush strokes onto the mesh's UV0 space and writes to a RenderTexture. This is the most flexible mode — it supports UDIM multi-tile layouts and produces texture assets that work with any standard shader. Think of it as a lite Substance Painter inside Unity.

PBR Paint

A compound mode that writes to multiple texture channels simultaneously in one brush stroke: Albedo (RGB), Normal (RG packed), Metallic (R), and Smoothness (A). Requires OptiDraw's template PBR shader or a compatible Shader Graph setup. Enables look-dev without leaving Unity.

Animation Draw Mode

Activates painting on a SkinnedMeshRenderer while an Animator component is running. OptiDraw samples the posed mesh each frame via the Job System, so brush raycasting hits the deformed surface — not the bind pose. Indispensable for painting skin weights visualizations, muscle masks, or animated cloth stiffness.