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# Materials: Compiler Commands {#mat_vmap}
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## vmap_tesssize
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### Syntax
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**vmap_tessSize <amount>**
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2022-10-17 20:33:16 +00:00
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### Overview
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Formely known as just **tessSize**.
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The command controls the tessellation size (how finely a surface is
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chopped up in to triangles), in game units, of the surface.
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This is only applicable to solid brushes, not curves, and is generally
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only used on surfaces that are flagged with the
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[deformVertexes](deformVertexes) keyword.
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Abuse of this can create a huge number of triangles. This happens during
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BSP processing, so maps must be reprocessed for changes to take effect.
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### Note {#note}
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It can also be used on tesselating surfaces to make sure that
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tesselations are large, and thus, less costly in terms of triangles
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created.
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