A capability indicates the presence or limits of a specific feature of the hardware that the game is running on, hence the name. They were introduced in version 1.4. You can query a given capability by using Device.GetCapability.

The following is a categorized list of all capabilities:

Graphics

Name	Type	Description
graphics_shaders	boolean	Whether shaders are supported by the current renderer. See Rendering.
gpu_maxTextureWidth	integer	The maximum texture width supported by the GPU.
gpu_maxTextureHeight	integer	The maximum texture height supported by the GPU.
gpu_maxTextureUnits	integer	The maximum amount of texture units supported by the GPU.