differences between uv mapping and material nodes

[kevin tan]

When will you use uv mapping and when will you use material nodes? 

[Kent Trammell]

UV mapping is for custom textures, meaning textures that you paint in Blender or Photoshop/Gimp/Krita.

Material nodes are for procedural textures that don’t require a custom UV layout.

For example, a character is a complex modeling that would require custom textures to be painted. But a simple stone could be textured procedurally with only nodes; no UV layout or texture paint required.

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