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ericwa / ericw-tools

Quake/Hexen 2 Map compiling tools - branch of http://disenchant.net/utils
http://ericwa.github.io/ericw-tools
GNU General Public License v2.0
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bsp compiler option to write bspx lump of lightmap dimensions to avoid compiler and engines disagreeing on size of lightmaps #309

Open Kinnuu opened 3 years ago

Kinnuu commented 3 years ago

the width and height of each lightmap is calculated independently by the compiler, and the engine. If they disagree, you can see lightmap glitches on faces - famous examples can be seen in ad_cruical and honey.

If a bspx lump of the compiler-calculated lightmap dimensions was written, then any future engines could just read this lump to guarantee no more of these glitches.

Paril commented 1 year ago

The dev version now supports this via -world_units_per_luxel, which also emits a width/height for the lightmap and simplifies the lightmap calculations in the engine.