Summarize the question. (e.g., "How to run reconstruction system with RealSense D435i? ")

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

Hey,

I have a question if I press left click in the Open3D app the point cloud seems to be better rendered/postprocessed.

Can you tell me what should be done in order to have this view by default? Or maybe where is the line of code that corresponds to this behavior?