1.Start a new project in Lens Studio

2.In the Objects pannel select `add New` -> `billboard`

https://imgur.com/ScMwh9Q
This creates an orthogonal camera and a 2D sprite that is set to cover the screen by default.

3. Uncheck the tick box next to `Sprite` in the Inspector pannel, so that it is initially hidden.
https://imgur.com/znBMkN6

4.In the Resources pannel select `add New` -> `script`.
https://imgur.com/8Ai7Fzv

5. Select this script and in the inspector pannel change its contents to:

// -----JS CODE-----

//Add inputs which can be acccessed using script.inputName

//@input Component.Camera camera
//@input Asset.Texture deviceCameraTexture
//@input Component.SpriteVisual spriteVisual

//Takes a screenshot which we can access with textureCopy
var textureCopy = script.deviceCameraTexture.copyFrame();

//Applies textureCopy to the sprite
script.spriteVisual.mainPass.baseTex = textureCopy;

//Shows the sprites visual that was hidden in step 3
script.spriteVisual.enabled = true;

https://imgur.com/QBZN6zU

6. Select the 2D sprite added in step 2 and add a script component in the Inspector pannel.
https://imgur.com/9UUgLwp

7. Select `Tapped` in the drop down next to the newly added script so it runs when the user taps.

8. Finally set the inputs you added in script (using @input)
	camera -> Orthographic Camera
	device camera texture -> Device Camera Texture
	Sprite Visual -> 2D sprite

https://imgur.com/GuWoiKK

Credit to u/maddogmular for the script since I have only slightly altered theirs.