View source for Hammer Smoothing Groups Dialog

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[[Category:Hammer Dialogs]]
The '''Smoothing Groups dialog''' allows you to match sets of faces that will be lit as one smooth surface when compiled.

[[Image:Face_Edit_Smoothing.png]]

== About Smoothing Groups ==

The Source Engine can add smoother lighting to faces so the surfaces appear as one continuous surface. [[Smoothing groups|Smoothing Groups]] are sets of these faces that are defined to render smooth with one another.

To be smoothed correctly, faces must meet these restrictions:

# Must share a common edge.
# Lightmaps of the faces must be aligned to one another.
# The [[Hammer Face Edit Dialog#Lightmap Scale|lightmap scale]] must be small enough that at least one lightmap luxel is small enough to fit on each face.
# Must be in the same Smoothing Group (or meet at a less than 45 degree angle).

== Smooth ==

These are the '''Smooth Group'''s that the current face(s) are a member of. To add a face to a '''Smoothing Group''', select the face, then depress the numbered button of a Smoothing Group. A face can be in multiple '''Smoothing Groups'''. {{note|Manually selected smoothing groups will override those generated automatically by the compiler and separate the group from other faces.}}

== Hard ==

Use these to pick a group of faces that will never be smoothed. '''Hard Groups''' are selected just like '''Smoothing Groups'''. For example, this can be used to make sure a ramp does not get smoothed with either of the floors it connects. {{note|Every face that belongs to a hard group will be separated from every other face in the group. To separate groups of faces from each other (for example, two flat walls that meet at a 45 degree corner and are composed of multiple brushes each), use smoothing groups instead.}}

== See Also ==
*[[Hammer Face Edit Dialog]]
*[[Smoothing groups]]