How do I make a map's background transparent in a layout?

Question

I am trying to add an overview map to my layout. The main map is projected while the overview map is a 'globe' (image below). I want to make the white part of the overview map transparent.

I have made the background transparent in page properties and I have turned off background for both maps. There is no option to make the background of the main QGIS window transparent.

Is there anything else I can do other than export separately and add it as an image with transparency values?

EDIT: Forgot to mention, I have looked at How to export a map with a transparent background in QGIS? but it didn't work.

I turned off background for the smaller map and it became transparent. — Erik, Mar 13 '19 at 15:42
Hi @Erik, see my own answer below. I'm just having a slow day. Thanks anyway — TeddyTedTed, Mar 13 '19 at 15:43

score 3 · Answer 1 · answered Mar 13 '19 at 15:42

3

Nevermind, I'm just an idiot.

I forgot that I had an inverted polygon turned on to add some fading to the outer edge. The solid fill of this was filling the rest of the layout.

Thanks anyways.

answered Mar 13 '19 at 15:42

TeddyTedTed

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How do I make a map's background transparent in a layout?

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