Enable Rendering of Transparent Panels

[lux4rd0]

What would you like to be added:

When rendering panels that have the "Display panel without a background" enabled, the renderer still adds a non-transparent background.

Why is this needed:

Would be nice to have a solid black background (if using dark theme) for exported graphs. #nicetohave

Thanks!

(Screenshot)

(Render)

[nargetdev]

I'm also very keen to see this functionality. Continuously compositing waterfall info into timelapse image stream requires an alpha channel

[nargetdev]

it seems like progress was made on this a while ago?

https://bugs.chromium.org/p/chromium/issues/detail?id=689349

comment 15..

The patch above adds --default-background-color=... :)
The color value should be provided as 32-bit RGBA hex

[maurerle]

Is this somehow possible to configure this for the whole plugin? I would love to see this!