$halflambert

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January 2024

Lambertian (left) and Half Lambertian (right)

Template:Shaderparam It is a boolean parameter that enables half-lambertian lighting, which wraps lighting further around a model to prevent it from losing definition. It only works on models.

Note:Since Source 2007, half-lambertian lighting is forcibly enabled on VertexLitGeneric regardless of $halflambert setting when $phong is enabled, unless $phongdisablehalflambert(in all games since ) is enabled.

Note:This parameter is disabled since due to conflicts with cascade shadow mapping.

Important:Does not work on static props which have lighting baked per-vertex or into lightmaps in stock VRAD; this could be achieved with a custom VRAD.

Important:In Black Mesa half-lambertian for new light is broken. The result is that meshes with $phong or $halflambert get lit from ALL sides perpendicular to newlights, including ones with opposing normals. If you want to use $phong or $halflambert - you are able to fix this with adding in your VMT material parameter "$halflambert_gbuffer_off" "1".

Syntax

$halflambert 1