scenes autosaving from streetmix result in blank screenshot

[kfarr]

As a user importing a street from streetmix and the street is automatically saved (per previous PR: specific file is src/index.js) then I see an error

This attempted fix #1009 removed the error from user and properly saves the scene as expected, however now the screenshot is not created and results in a black box being saved as the thumbnail for most scenes

[rahulkgupta]

There seems to be a race condition with saving images, im wondering if we can use the posthog way of saving images instead of using aframe. Alternatively, is there a way to wait until the screenshot is created before trying to save?

[rahulkgupta]

Lastly, is there a way to wait for the scene to be loaded prior to the saving function to fire, as opposed to the random 1 second timeout

[vincentfretin]

When I import from streetmix, I see two projects created each time

The first time, it created a project without title, black screenshot, and a project with title and screenshot
The second time, it created two projects with title and black screenshot.

[vincentfretin]

#1014 fixes all the issues I saw.