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Question by qhhh · Jan 05, 2011 at 07:42 PM · lightmapping

Is there a way to set an object's "Scale In Lightmap" in a script?

The Lightmapping window's Object tab has a "Scale In Lightmap" parameter, is there a way to set its value in a script?

The other parameters ("Static" and "Atlas") are available through the GameObject and MeshRenderer classes respectively but I've been unable to find any information on how to access "Scale In Lightmap".

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Answer by Aras · Jan 10, 2011 at 07:32 PM

It's not exposed as an API (wouldn't be very useful at runtime), but you can access and modify it from Editor scripts via SerializedProperty. Something like:

SerializedObject so = new SerializedObject (go.renderer);
so.FindProperty("m_ScaleInLightmap").floatValue = 0;
so.ApplyModifiedProperties();
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avatar image Cameron_SM · Aug 13, 2014 at 03:19 AM 0
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It would be nice if this was exposed via an editor API, if you write scripts that instance custom meshes in the editor then it's a bit frustrating to have to track down and write in little hacks like this to get at everything.

avatar image bansheesoft · May 13, 2015 at 04:43 AM 0
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This is now obsolete and setting via ren.lightmapScaleOffset = scaleOffset; does not work are there any work arounds?

avatar image Hzz_xingtu bansheesoft · Apr 10, 2019 at 08:01 AM 0
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i tried it in unity 2018.3.5,but it does't work...

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Answer by pawel_piotrowski · Dec 04, 2016 at 10:48 AM

I managed to get it to work:

     GameObject test = GameObject.Find ("bread_1_1");
     Renderer rend = test.GetComponent<Renderer>();
     SerializedObject so = new SerializedObject (rend);
     so.FindProperty("m_ScaleInLightmap").floatValue = 50;
     so.ApplyModifiedProperties();
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