It is possible to get that effect. Just parent the second camera to your character and make it move with your character.
It is possible to convert RenderTexture to a Sprite. First of all, convert the RenderTexture to Texture2D then convert the Texture2D to Sprite with the Sprite.Create function.
It is better to disable the second or mirror camera then use mirrorCam.Render() to manually render it only when you need to. The script below should get you started. Attach it to an empty GameObject then assign the mirror camera and the target SpriteRenderer from the Editor and it should mirror the what the camera is seeing to the SpriteRenderer. Don't forget to plugin RenderTexture to the mirror camera.
public class CameraToSpriteMirror: MonoBehaviour
{
public SpriteRenderer spriteToUpdate;
public Camera mirrorCam;
void Start()
{
StartCoroutine(waitForCam());
}
WaitForEndOfFrame endOfFrame = new WaitForEndOfFrame();
IEnumerator waitForCam()
{
//Will run forever in this while loop
while (true)
{
//Wait for end of frame
yield return endOfFrame;
//Get camera render texture
RenderTexture rendText = RenderTexture.active;
RenderTexture.active = mirrorCam.targetTexture;
//Render that camera
mirrorCam.Render();
//Convert to Texture2D
Texture2D text = renderTextureToTexture2D(mirrorCam.targetTexture);
RenderTexture.active = rendText;
//Convert to Sprite
Sprite sprite = texture2DToSprite(text);
//Apply to SpriteRenderer
spriteToUpdate.sprite = sprite;
}
}
Texture2D renderTextureToTexture2D(RenderTexture rTex)
{
Texture2D tex = new Texture2D(rTex.width, rTex.height, TextureFormat.RGB24, false);
tex.ReadPixels(new Rect(0, 0, rTex.width, rTex.height), 0, 0);
tex.Apply();
return tex;
}
Sprite texture2DToSprite(Texture2D text2D)
{
Sprite sprite = Sprite.Create(text2D, new Rect(0, 0, text2D.width, text2D.height), Vector2.zero);
return sprite;
}
}
