Change sharedMaterials property has no effect

Hello,

I am stucked by a weird bug. I am trying to enable sharedMaterials' keyword. This is my code:

Code (CSharp):

1.             foreach (Material mat in mats)
2.             {
3.                 mat.EnableKeyword("_COMPRESSEDMESH");
4.                 mat.SetFloat("_RenderBound", defaultRenderBound);
5.                 UnityEditor.EditorUtility.SetDirty(mat);
6.             }
7.             AssetDatabase.SaveAssets();
8.             AssetDatabase.Refresh();

However, I find that although my svn shows the mat files have been changed successfully(by diff), the materials are not changed in UnityEditor(by enable debug view on inspector).

 

I found the bug. The shaderGUI always override my settings...

 

Can you explain that a little more? How and when does the GUI override the settings? Is there anything that can be done to prevent the settings from being overwritten?

 

I found a solution!

So before I was doing this...

1) Material mat = new Material(shader)
2) mat.CopyPropertiesFromMaterial(otherMaterial);
3) mat.SetFloat("_MyParameter", 8.88f); // SetTexture(), etc
4) AssetDatabase.CreateAsset(mat, path);
5) AssetDatabase.SaveAssets();

It seems like that would work just fine. But no!!
I had to change it to:

1) Material mat = new Material(shader)
2) AssetDatabase.CreateAsset(mat, path);
3) mat.CopyPropertiesFromMaterial(otherMaterial);
4) EditorUtility.SetDirty(mat);
5) AssetDatabase.SaveAssets(); // middle save
6) mat.SetFloat("_MyParameter", 8.88f); // SetTexture(), etc
7) EditorUtility.SetDirty(mat);
8) AssetDatabase.SaveAssets(); // final save

Success!

One big change was moving CreateAsset() to the beginning so that I could call save earlier.

The other was setting dirty and saving after CopyPropertiesFromMaterial() but before calling SetFloat(). Without that, all changes go bye-bye. Something funky is going on inside CopyPropertiesFromMaterial().