Caio Raphael

Why it's usually done in object space, and not tangent space?
- Object-space normal maps are easier to author and more stable, while tangent-space normal maps are better suited to assets that need to be reused, deformed, or mirrored.
- Object-space makes painting very intuitive. If you're painting a bump on the character's forehead, you can directly paint the direction the surface should face.
  - red → +X
  - green → +Y
  - blue → +Z
- Tangent-space maps much less intuitive to paint manually. A red/green change doesn't consistently mean "move the normal toward +X/+Y"; it means "move it along the local tangent/bitangent direction".
- Object-space maps are especially popular for hard-surface assets that don't deform.
  - weapon
  - prop
  - vehicle
  - machinery
  - architectural asset
- Converting from one to the other :
  - You usually re-bake them.
  - Bake to paint in object space -> re-bake to tangent space for engine use, animations, etc.
Cody Gindy - 3D Painted Look with Painted Normals for a tea jar
- Paints in object space.
Craft Reaper - 3D Painted Look with Painted Normals for a knight
- Paints in object space. Doesn't re-bake to tangent space.

Lassyla - 3D Water Color Stylized Shader
- Uses fresnel, etc. Completely procedural.
- Good explanation of noise.

Deep Paint
- Paid, very expensive, with a "soft-subscription model".
ShapeScape Studio
- Cody Gindy - ShapeScape Studio
- It's an addon for 3D Trees with billboarded painted leaves.
- Paid.
Watercolor Look In Blender
- Paid.

Stylization