Recompiling Light Only Last edited 1 month ago2020-07-01 06:43:39 UTC

Even fairly optimized maps can take a long time to compile VIS, therefore it is useful to compile only CSG and RAD if you only want to make adjustments to lighting or other entities.

Requisites

-onlyents

This is the faster method. If you compile your map with the -onlyents parameter in CSG, it will overwrite the entity data lump in the map without affecting the geometry, lightmaps, cliphulls or visleaves. Afterwards, you can compile with RAD normally.
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Ripent

Instead of CSG, I will be using Ripent, a tool used for exporting and importing entity data. You can move and rotate entities, delete entities and even create new entities that use existing brush models. I will be using Ripent to edit the light entity before recompiling with RAD.

Export

Use the command line to run Ripent on your map with the -export parameter. This will create an ENT file in the directory your map is in.
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Modify

Modify the entity file as you see fit.
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Import

Import the new entity file with the -import parameter. If you have baked textures (zhlt_embedlightmap), it may be a good idea to use -deleteembeddedlightmaps too.
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Compile

Compile your map with RAD.
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If you reload your map in-game, you should have the new lighting.
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