View source for AllocBlock:Full

{{gldsrc topicon}}
{{update|
* AllocBlock is the allocation of lightmaps (64 in first-party titles, 512 in {{sven}}).
* AllocBlock errors are purely related to [[lightmap]] atlas generation. Lightmaps are always 16 [[luxel]]s per [[texel]], so the easiest way to use up AllocBlock is to have a lot of brushes with dense texture scales.
* '''''AllocBlock is why {{gldsrc|4.1}} mappers use 1.0 texture scale by default.'''''
}}
==Description==
While compiling or attempting to play it, your map has exceeded the maximum lightmap size.

==Solution==
Reduce resolution and scale of used textures. Consider using [[Detail textures (GoldSrc)|Detail textures]] to increase the perceived quality of WAD textures, instead of using high-res WAD textures.
: {{Important|Users whose GPUs have blocked the {{code|GL_ARB_multitexture}} extension (such as for {{pcgw|Half-Life#OpenGL_overbright_lighting|enabling overbright lighting}}) will not see detail textures.}}

Additional optimization options include:
* Use [[tool textures (GoldSrc)|NULL]] whenever a brush entity's face is completely obscured by a world brush or another entity.
* After compiling CSG, BSP and VIS, use {{newbspguy|2}} to add the {{code|TEX_SPECIAL}} flag to faces which should be unlit (fullbright), then recompile RAD from within NewBSPGuy.
* For brush entities which should be unlit, use [[VHLT]]'s {{code|zhlt_striprad}} KV to strip lightmaps from the entity after RAD is compiled.

== External links ==
* {{twhl|AllocBlock}}

[[Category:Compile errors]]