PPL: Difference between revisions
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Note:Being always RGB888 is a VRAD limitation, not a format or engine one; a custom compiler could make DXT1, I8, or even RGBA16161616F lightmaps, and these would be properly loaded by the game.
Important:To account for potential discrepancies between UV maps of LoD models, PPL files contain a lightmap for each LoD model. This can greatly increase the file size of a map if a lightmapped model has several LoD models!
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'''PPL''' files are lightmaps ('''p'''er-'''p'''ixel '''l'''ighting) generated by [[VRAD]] for {{ent|prop_static}} models that have {{code|[[$lightmap|generatelightmaps]]}} enabled. Unlike brush lightmaps, PPL files are always uncompressed RGB888 (24-bit {{w|Standard dynamic range|SDR}}), even when the map is compiled in [[HDR]] mode. | '''PPL''' files are lightmaps ('''p'''er-'''p'''ixel '''l'''ighting) generated by [[VRAD]] for {{ent|prop_static}} models that have {{code|[[$lightmap|generatelightmaps]]}} enabled. Unlike brush lightmaps, PPL files are always uncompressed RGB888 (24-bit {{w|Standard dynamic range|SDR}}), even when the map is compiled in [[HDR]] mode. | ||
{{note|Being always RGB888 is a VRAD limitation, not a format or engine one; a custom compiler could make DXT1, I8, or | {{note|Being always RGB888 is a VRAD limitation, not a format or engine one; a custom compiler could make DXT1, I8, or even RGBA16161616F lightmaps, and these would be properly loaded by the game.}} | ||
{{modernImportant|To account for potential discrepancies between [[UV map]]s of [[$lod|LoD]] models, PPL files contain a lightmap for each LoD model. This can greatly increase the file size of a map if a lightmapped model has several LoD models!}} | {{modernImportant|To account for potential discrepancies between [[UV map]]s of [[$lod|LoD]] models, PPL files contain a lightmap for each LoD model. This can greatly increase the file size of a map if a lightmapped model has several LoD models!}} | ||
Revision as of 08:40, 27 March 2024
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PPL files are lightmaps (per-pixel lighting) generated by VRAD for prop_static models that have generatelightmaps enabled. Unlike brush lightmaps, PPL files are always uncompressed RGB888 (24-bit 
SDR), even when the map is compiled in HDR mode.
Note:Being always RGB888 is a VRAD limitation, not a format or engine one; a custom compiler could make DXT1, I8, or even RGBA16161616F lightmaps, and these would be properly loaded by the game.Important:To account for potential discrepancies between UV maps of LoD models, PPL files contain a lightmap for each LoD model. This can greatly increase the file size of a map if a lightmapped model has several LoD models!A PPL file can be converted to uncompressed VTF(s) using Ficool2's proptexelvtf.exe, which can then be used for $lightmap.
See also
- VHV, the equivalent for vertex-lit props