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question: light map
https://www.quake3world.com/forum/viewtopic.php?f=10&t=51893
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Author:  CLOUDspawn [ 03-24-2016 05:05 PM ]
Post subject:  question: light map

what is a light map? or a light image?
do i make it in photoshop? is it like an alpha channel?
I googled it a couple times and came up with nothing.
anybody know?

Author:  obsidian [ 03-24-2016 08:35 PM ]
Post subject:  Re: question: light map

https://en.wikipedia.org/wiki/Lightmap

In regards to Q3, they are automatically generated by the compiler Q3Map2, stored in the BSP file, and are subtractively filtered over the base texture.

Author:  sst13 [ 03-26-2016 05:14 AM ]
Post subject:  Re: question: light map

Texture only "fullbright" (r_fullbright 1; vid_restart)


+

Lightmap only (r_lightmap 1)


=

Textures & Lightmap combined



A Lightimage (shader related) is a simple texture. It's average color is used to generate the color of the light emitted by the shader surface.

Author:  AEon [ 03-26-2016 05:32 AM ]
Post subject:  Re: question: light map

Awesome demo shots to explain the effect of a lightmap... neat.

Author:  sst13 [ 03-26-2016 06:29 AM ]
Post subject:  Re: question: light map

It's also possible to view vertex-light only with: "r_vertexlight 1; r_fullbright 1; vid_restart"

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