$treesway

Tree with treesway on de_lake in CS:GO (click on image if GIF is not animated).

Template:Shaderparam It is also available in . In , it can also be used for UnlitGeneric.

$treesway morphs a material around using the parameters of an env_wind entity to give the appearance of tree leaves and foilage blowing in the wind. The subparameters of $treesway determine how much the env_wind entity should affect the morphing, and all of them (except $treeswaystatic) must be specified in order for the effect to work properly. This shader parameter assumes any model using it is facing upwards.

Warning:Due to the way bumped lighting is calculated, $treesway will not sway materials which use $bumpmap.

Note:This shader parameter is disabled by default in the SDK. It can re-enabled by modding.

Bug:This shader parameter does not work with $detailtexturetransform.  [todo tested in ?]

Bug:In , using a shadow-casting projected texture on materials with this parameter will cause flickering. As a workaround, try to keep trees away from where player flashlights can reach. $halflambert may also partially fix the issue.  [todo tested in ?]

Bug:In , using a shadow-casting projected texture will cause shadows not reacting to $treesway, shadows don't move, expect in .  [todo tested in ?]

Todo: What about $singlepassflashlight and $flashlightnolambert?

Important:While $TreeSway can be used to animate a prop_static, lightmap shadows casted by swaying static props will remain static.
If CSM is unavailable, consider using a prop_dynamic instead. This can be combined with an animation containing more realistic pre-baked wind physics than can be achieved with $treesway, as seen in de_prime.

Parameters

$treesway $treeswayheight $treeswaystartheight $treeswayradius $treeswaystartradius $treeswayspeed $treeswaystrength $treeswayscrumblespeed $treeswayscrumblestrength $treeswayscrumblefrequency $treeswayfalloffexp $treeswayscrumblefalloffexp $treeswayspeedhighwindmultipler $treeswayspeedlerpstart $treeswayspeedlerpend $treeswaystatic $treeswaystaticvalues

See Also

https://gamebanana.com/tuts/12924 - How to achieve a similar effect without $treeSway, on all source engine games. Alternatively, use an animated prop_dynamic, for a more realistic (but more expensive) effect.