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[3.x] Document LIGHT_COLOR being multiplied by PI in Spatial shader #7568

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Jul 6, 2023
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[3.x] Document LIGHT_COLOR being multiplied by PI in Spatial shader #7568

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5 changes: 4 additions & 1 deletion tutorials/shaders/shader_reference/spatial_shader.rst
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Expand Up @@ -377,7 +377,10 @@ If you want the lights to add together, add the light contribution to ``DIFFUSE_
+-----------------------------------+-----------------------------------------------------+
| in vec3 **ALBEDO** | Base albedo. |
+-----------------------------------+-----------------------------------------------------+
| in vec3 **LIGHT_COLOR** | Color of light multiplied by energy. |
| in vec3 **LIGHT_COLOR** | Color of light multiplied by ``energy * PI``. |
| | The ``PI`` multiplication is present because |
| | physically-based lighting models include a |
| | division by ``PI``. |
+-----------------------------------+-----------------------------------------------------+
| out float **ALPHA** | Alpha (0..1); if written to, the material will go |
| | to the transparent pipeline. |
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