3D Modeling and Textures Painting In Unity3D

A Project That I build in Free Time 😊 A comprehensive toolkit for creating, editing, and texturing 3D models directly within the Unity Editor. This Blender-like asset integrates modeling, UV unwrapping, texture painting, and material editing into a single unified workflow.

Features

• Integrated Modeling Environment: Create and edit 3D models directly in Unity
• UV Unwrapping: Powerful UV editing and unwrapping tools
• Texture Painting: Direct painting on 3D models in the viewport
• Material Editing: PBR material editing with real-time preview
• Single Workflow: Seamlessly switch between modeling, UV editing, texturing, and material editing

Graphic Engine

Vulkun Info

Single Integrated Workspace

• All features accessible from one editor window
• Scene-like viewport with camera controls (orbit, pan, zoom)
• Consistent UI across all tool modes

Vector Processing Formula

How it's Working ?

• Linear Algebra (Core Foundation) Everything in 3D graphics is built on linear algebra.
• Vectors → Represent position, direction, velocity, color (RGB), normals.

 v =(x,y,z)

• Matrices → Represent transformations like translation, rotation, scaling, and projection.

Model-View-Projection: MMVP​=Mprojection​⋅Mview​⋅Mmodel​

• Dot Product → For lighting intensity and angle between vectors.
• Interpolation (slerp):

I=L⋅N

• Cross Product → For normals and perpendicular directions.

N=A×B

Vectors → Represent position, direction, velocity, color (RGB), normals

Modeling Tools

• Create basic primitives (cube, sphere, cylinder, plane)
• Select and edit vertices, edges, and faces
• Transform operations (move, rotate, scale)
• Advanced operations (extrude, bevel, loop cut)
• Mesh smoothing and subdivision
• Boolean operations (union, subtract, intersect)

UV Editing

• Automatic UV unwrapping
• Multiple projection methods (planar, box, spherical, cylindrical)
• Manual UV adjustment with direct manipulation
• UV packing and optimization

Realtime Sync To Unity Graphic Engine

Texture Painting

• Direct painting on 3D models in the viewport
• Support for multiple texture channels (albedo, normal, metallic, etc.)
• Customizable brush settings (size, hardness, opacity)
• Layer-based texture editing

Material Editing

• PBR material editing with real-time preview
• Adjust standard material properties (color, metallic, smoothness)
• Import and export textures
• Create and save materials

Import/Export

• Import models from OBJ format
• Export models with UVs and materials
• Support for FBX and GLB (requires additional packages)

Type Kernal

1. Navier–Stokes equations describe fluid motion

2. Simplified for particle systems (SPH - Smoothed Particle Hydrodynamics).

• Used for smooth 3D rotation without gimbal lock.
• Represent rotation in 4D space:

  q=w+xi+yj+zk
  

• Integration → For motion over time, e.g. physics updates.

  x(t+Δt)=x(t)+v(t)Δt
  

Getting Started

1. Open the toolkit window from: Window > 3D Toolkit > Integrated Modeling Tool

2. Select or import a 3D model to begin editing

3. Use the top toolbar to switch between tool modes:

   • Model: For mesh editing operations
   • UV: For UV unwrapping and editing
   • Texture: For texture painting
   • Material: For material editing

4. Use the right-click + drag to orbit the camera, scroll to zoom, and shift + right-click to pan

Keyboard Shortcuts

• F: Focus on selected object
• Q: Switch to Select mode
• W: Switch to Move mode
• E: Switch to Rotate mode
• R: Switch to Scale mode
• 1-4: Switch between Model, UV, Texture, and Material modes
• Ctrl+Z: Undo
• Ctrl+Y: Redo
• Ctrl+S: Save

Requirements

• Unity 2020.3 or newer
• For FBX import/export: Unity's FBX Exporter package
• For GLB import/export: Unity's glTF importer/exporter package

Known Limitations

• Boolean operations are placeholder implementations
• Some advanced modeling operations are simplified
• High-poly meshes may impact performance

Extending the Toolkit

The toolkit is designed to be modular and extensible:

1. Add new mesh operations by extending the MeshOperations class
2. Create custom brushes by extending the TexturePainter class
3. Add new material shaders by modifying the MaterialEditor class

Troubleshooting

• Import/Export issues: Ensure the required packages are installed
• Performance issues: Reduce mesh complexity or texture resolution
• UV unwrapping problems: Try different projection methods

Getting Started

1. Open the toolkit from: Window > 3D Toolkit > Integrated Modeling Tool
2. Import or create a 3D model to begin editing
3. Use the top toolbar to switch between different tool modes

Requirements

• Unity 2020.3 or newer
• For FBX import/export: Unity's FBX Exporter package
• For GLB import/export: Unity's glTF importer/exporter package

Documentation

For detailed documentation, see the in-tool README.

License

This toolkit is provided under the MIT License.