**Emissive Color** Specifies the type of UV mapping to uses for the **Emission Map**.
• Unity manages four UV channels for a vertex: **UV0**, **UV1**, **UV2**, and **UV3**.
• **Planar:** A planar projection from top to bottom.
• **Triplanar**: A planar projection in three directions:
• X-axis: Left to right
• Y-axis: Top to bottom
• Z-axis: Front to back

Unity blends these three projections together to produce the final result.
• **Same as Main Layer**: Unity uses the option selected for **Main Layer > Surface Inputs > Base UV Mapping**.