IBackgroundColor not working

[vux]

As per:

introduced IBackgroundColor

I got latest alpha, added on DX11 Renderer window and window is still gray for a bit.

Checked in SVG renderer and it actually does the same (it’s still gray for a little bit before switching to black).

[joreg]

see: request: renderer to have a black background on initialisation · Issue #89 · mrvux/dx11-vvvv · GitHub