Katana 3.5v5 docs:

LookFileMultiBake

LookFileMultiBake is a convenient SuperTool that wraps multiple LookFileBake nodes into a single node. Passes are shared between nodes, and the Look Files can be baked individually or all at once.

Connection Type	Connection Name	Function
Input	orig	The original, or pre-existing scene graph to which the default or additional inputs are compared.
default	A second scene graph or LookFileBake node that has different passes to compare to the default. The Look File saves the difference between the original and default pass, or any additional passes.

Connection Type

Connection Name

Function

Input

orig

The original, or pre-existing scene graph to which the default or additional inputs are compared.

default

A second scene graph or LookFileBake node that has different passes to compare to the default. The Look File saves the difference between the original and default pass, or any additional passes.

Control (UI)	Default Value	Function
	N/A	Creates a new LookFileBake and adds it to the LookFileBake list.
When an entry has been added
rootLocations	/root/world	Sets one or more scene graph path(s) to the location(s) to be created. The locations parameter options are available by clicking Add Locations or dropdown menu. For more information, refer to the Scene Graph Location and Locations Widget Types in Common Parameter Widgets.
	N/A	Brings up a searchable list to aid in selection.
saveTo	N/A	Sets where to store the baked Look File. For more information, refer to the Asset and File Path Widget Types in the Common Parameter Widgets.
Passes
name	pass	Passes are typically render passes, but could also be auxiliary baking passes for generating point clouds or brickmaps. A LookFile can have one or multiple passes. To add a pass, select Add > Add Pass Input. A new pass input is created on the node, and a pass name field is added to the pass list. To change the pass name, simply change the name text field supplied. Note: All pass names must be unique.
LookFileMultiBake parameters continued
includeGlobalAttributes	No	When set to Yes, attributes on /root are stored in the baked Look File.
alwaysIncludeSelectedMaterial Trees	No	If enabled, this includes all material locations at or below the paths specified by selectedMaterialTreeRootLocations without regard to whether they are assigned to geometry within the scope of the rootLocations paths.
When alwaysIncludeSelectedMaterialTrees: yes
selectedMaterialTreeRootLocations	/root/materials/geo	Sets one or more scene graph path(s) to the location(s) to be created. The locations parameter options are available by clicking Add Locations or dropdown menu. For more information, refer to the Scene Graph Location and Locations Widget Types in Common Parameter Widgets.
Write
Write All Look Files...	N/A	Click to bake all the Look Files.
Writes Selected Look Files...	N/A	Click to bake the selected Look Files.