View source for Bmodel

{{DISPLAYTITLE:bmodel}}
A '''bmodel''' (short for '''brush model''') is a [[model]] made out of [[BSP]] brushes. These are normally called from within the currently loaded BSP map file. Each bmodel uses its own [[BSP tree]]; there is a bmodel for [[worldspawn]], as well as bmodels for each [[brush entity]].

The [[struct]] used to define bmodels in {{file|bspfile|h}} is {{code|dmodel_t}}. The "D" might stand for "display", being consistent with other structs in the file.

With the exception of the bmodel used by [[worldspawn]], bmodels are called from an [[entity]] using {{code|<nowiki>*#</nowiki>}} in the {{code|model}} [[KV]], wherein # is an [[integer]] index representing the location of the bmodel in the BSP file. Worldspawn always uses bmodel 0, and does not require a {{code|model}} key; in fact, bmodel 0 cannot be loaded via the {{code|model}} key.

* In {{quake|4.1}}, and by extension {{gldsrc|4.1}}, any entity can use bmodels from a separate BSP file from the currently loaded map. If a bmodel is loaded from a separate BSP separate, the worldspawn bmodel will be used.
:{{note|All [[point entity|point entities]] can use [[MDL]]s, [[SPR]]s, bmodels, and separate [[BSP]] models interchangeably in {{quake|4.1}} and {{goldsrc|4.1}}.<br>Some brush entities, such as {{ent|func_illusionary (GoldSrc)|alt=func_illusionary}} or {{ent|func_healthcharger (GoldSrc)|alt=func_healthcharger}} can be used as point entities this way, although the defined model must have been prechached.{{tip|In [[VHLT]], pointing {{code|zhlt_usemodel}} to a {{ent|cycler (GoldSrc)|alt=cycler}} can be used to streamline this process, ensuring the entities are defined in the correct order in the compiled BSP.}}}}
:{{modernImportant|Bmodels contained in separate BSPs are usually fullbright, because they cannot inherit lighting info from the world.{{tip|Use [[ericw-tools]] and compile with {{code|-dirtdebug}} to apply some generic ambient occlusion to the standalone BSP model's lightmaps, improving visibility, or  manually paint lightmaps with [[newbspguy]].}} }}
* In {{quake2|4.1}}, and by extension {{src|4.1}}, only bmodels built into the current [[map]] can be used.{{confirm}}
:{{note|Although the {{code|model}} KV is used for bmodels, sprites, and [[MDL]] models, they are not interchangeable in {{src|4}}{{confirm}}. In {{quake2|4}}, only [[MD2]] models and [[SP2]] sprites are interchangeable.}}

[[Category:Glossary]]