Light Combiner Editor Tool

[Cameron-Micka]

Overview

LightCombinerWindow is an EditorWindow class for Unity that provides a user interface to combine light maps with albedo textures or hijack another texture for lightmaps. This is useful for exporting scenes to glTF (or other formats) where lightmaps are not supported.

For example, here is a glTF (.glb) of a scene exported without combining lightmaps:

an example of a glTF (.glb) after performing the "Merge With Albedo" technique:

A follow up to this PR will be docs and samples.

Verification

As a reviewer, it is possible to check out this change locally by using the following
commands (substituting {PR_ID} with the ID of this pull request):

git fetch origin pull/{PR_ID}/head:name_of_local_branch

git checkout name_of_local_branch

[Copilot]

Pull Request Overview

This PR introduces a new Unity Editor component, CustomProbe, to adjust ambient light settings for scenes where lightmaps have been removed.

• Adds a new CustomProbe class to set custom ambient light values via light probes.
• Configures material property blocks to update renderer properties accordingly.

Comments suppressed due to low confidence (1)

com.microsoft.mrtk.graphicstools.unity/Runtime/LightCombiner/CustomProbe.cs:23

• [nitpick] Consider renaming the local variable '_renderer' to 'renderer' since the underscore prefix is typically reserved for private fields, which may improve clarity.

var _renderer = GetComponent<Renderer>();