Unity: Combine two textures in one, basic in TextureA copy TextureB

CombineTexture.cs

Texture2D CombineTexutes(Texture2D _textureA, Texture2D _textureB)
	{
		//Create new textures
		Texture2D textureResult = new Texture2D(_textureA.width, _textureA.height);
		//create clone form texture
		textureResult.SetPixels(_textureA.GetPixels());
		//Now copy texture B in texutre A
		for (int x = 0; x<_textureB.width; x++)
		{
			for (int y = 0; y<_textureB.height; y++)
			{
				Color c = _textureB.GetPixel(x, y);
				if (c.a > 0.0f) //Is not transparent
				{
					//Copy pixel colot in TexturaA
					textureResult.SetPixel(x, y, c);
				}
			}
		}
		//Apply colors
		textureResult.Apply();
		return textureResult;
	}