Converting RenderTexture to Texture2D in Unity 2019 - unity3d

Question

I'm using Intel Real Sense as camera device to capture picture. The capture result is displayed as a RenderTexture. Since I need to sent it via UDP, I need to convert it to byte[], but it only work for Texture2D. Is it possible to convert RenderTexture into Texture2D in unity 2019?
Edit:
Right now, I'm using this code to convert RenderTexture to Texture2D:
Texture2D toTexture2D(RenderTexture rTex)
{
Texture2D tex = new Texture2D(rTex.width, rTex.width, TextureFormat.ARGB32, false);
RenderTexture.active = rTex;
tex.ReadPixels(new Rect(0, 0, rTex.width, rTex.height), 0, 0);
tex.Apply();
return tex;
}
I got this code from here, which doesn't work anymore for unity 2019 since if I display the texture it only give me white texture.
Edit 2:
Here how i called that function:
//sender side
Texture2D WebCam;
public RawImage WebCamSender;
public RenderTexture tex;
Texture2D CurrentTexture;
//receiver side
public RawImage WebCamReceiver;
Texture2D Textur;
IEnumerator InitAndWaitForWebCamTexture()
{
WebCamSender.texture = tex;
CurrentTexture = new Texture2D(WebCamSender.texture.width,
WebCamSender.texture.height, TextureFormat.RGB24, false, false);
WebCam = toTexture2D(tex);
while (WebCamSender.texture.width < 100) //WebCam
{
yield return null;
}
StartCoroutine(SendUdpPacketVideo());
}
then i'll send it via network like this :
IEnumerator SendUdpPacketVideo()
{
...
CurrentTexture.SetPixels(WebCam.GetPixels());
byte[] PNGBytes = CurrentTexture.EncodeToPNG();
...
}
On receiver side, i'm gonna decode it and display on raw image:
....
Textur.LoadImage(ReceivedVideo);
WebCamReceiver.texture = Textur;
...

Answer 1

The most optimized way to do this is:
public Texture2D toTexture2D(RenderTexture rTex)
{
Texture2D dest = new Texture2D(rTex.width, rTex.height, TextureFormat.RGBA32, false);
dest.Apply(false);
Graphics.CopyTexture(rTex, dest);
return dest;
}