Script rendering Mesh to Image with transparent background

I found the answer:

Here:

https://docs.unity3d.com/Manual/class-RenderTexture.html https://answers.unity.com/questions/22954/how-to-save-a-picture-take-screenshot-from-a-camer.html

1. Create a render texture

2. Attach render texture to a camera, which should only capture the object / mesh

3. Set Camera to only render a specific layer

4. On capture (eg k press) move camera infront of specific game object and move game object to cameras specific render layer.

5. Capture image given code below / answer links.

6. (If unsused) dispose of Destroy(screenShot )

     private void Start()
        {
            captureCamera.enabled = false;
        }
    
        void LateUpdate()
        {
            capture |= Input.GetKeyDown("k");
            if (capture)
            {
                captureCamera.Render();
                RenderTexture.active = captureCamera.targetTexture;
                Texture2D screenShot = new Texture2D(screenShotWidth, screenShotHeight, TextureFormat.RGBA32, false);
                screenShot.ReadPixels(new Rect(0, 0, screenShotWidth, screenShotHeight), 0, 0);
                RenderTexture.active = null;
                screenShot.Apply();
                byte[] bytes = screenShot.EncodeToPNG();
                System.IO.File.WriteAllBytes(ScreenShotName(screenShotWidth, screenShotHeight), bytes);
                Debug.Log(string.Format(ScreenShotName(screenShotWidth, screenShotHeight)));
                capture = false;
            }
                
        }