Create a simple in-engine UI

[kimkulling]

trafficstars

Is your feature request related to a problem? Please describe. We need to have some in-engine UI. It would be possible to use it like win32 based uis

Describe the solution you'd like A clear and concise description of what you want to happen.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.