Why displayed wrong texture?

Questions & Answers
1

I synthesize a texture using “new Texture2D” and “SetPixel”. I assign this to a “GUITexture.texture”. Why is this displayed as if all pixels were transparent gray? PNG textures are displayed correctly.

Example of synthesized texture (Tx) on a GUITexture instance.

Texture2D Tx = new Texture2D(128,128,TextureFormat.ARGB32) ;
for( int i=0 ; i<Tx.width ; i++ )
    for( int j=0 ; j<Tx.heigth ; j++ )
        Tx.SetPixel(i,j,new Color(0f,0.5f,1f,1f)) ;
GameObject.Find("Blue Square").GetComponent<GUITexture>().texture = Tx ;
2

You forgot apply your texture in memory. See code:

 Texture2D Tx = new Texture2D(128,128,TextureFormat.ARGB32);
 for(int i = 0; i < Tx.width; i++)
  for(int j = 0 ; j < Tx.heigth; j++)
   Tx.SetPixel(i,j,new Color(0f,0.5f,1f,1f));
 Tx.Apply(); //apply your texture
 GameObject.Find("Blue Square").GetComponent<GUITexture>().texture = Tx;

I hope that it will help you.