[Unity] Copy Texture

Texture2D destTex = new Texture2D(sourceTex.width, sourceTex.height);
Color32[] pix = sourceTex.GetPixels32();
destTex.SetPixels32(pix);
destTex.Apply();

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- Using for deep copy.
- Don't use Color, use Color32 : It's much faster and uses 4X less memory.
- Recommend : Graphics.CopyTexture (If you use newest Unity ver)