Avoiding black screen before first render with alpha: false

[dangrabcad]

In my application I need to create the canvas with alpha: false so it's not being composited onto the background all the time. But when I do this, the canvas is black for a fraction of a second while the renderer starts up, until it draws its first GL frame. This happens every time the canvas is shown again after being hidden.

To avoid the ugly black screen, I'd like to have it show up the same colour as my application's background (which I'm also setting the GL clear colour to in onCreated), or not visible at all, until the first frame is drawn. But not visible at all seems like a problem because the black render comes back every time the canvas is hidden.

What's a good way to get the performance benefit of alpha: false without flashing black every time the canvas is shown?