BModel

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BModel (bsp model, submodel, mapobject model) is a model constructed in level editor out of brushes or patches and compiled into the .bsp file. Brush model can have triangle models attached (they become a part of the model). Doors, trains, platforms are bmodels.

BModel could be internal (supplied with the level and have special names such as *1, *2, *3 etc.) and external (BSP files). External BSP model differs from level file, it usually have no VIS data, entities, and other level-specific data.

Benefits

• very fast to render
• automatically get collisions
• supplied with level .bsp's (no external files)
• easy to construct in level editor (dont need a third party tools)
• can be lightmapped or lit dynamically (using lightgrid)
• can have triangle models attached

Drawbacks

• cannot be animated (only moved/rotated)
• badly optimized mesh (since it automatically generated from brushes)
• complex models with lots of corners or curved surfaces is not that easy to make

See also

• Radiant glossary
• Q3BSP