making nice images with Phoenix

[sponce]

One thing people from the outreach like to get is nice pictures which can be used then by media in general and newspapers in particular. These picture need decent resolution (4K or more typically). Now phoenix is only able to produce screenshots, so requires you have a very big screen if you want a nice picture.

Is there anyway to get a "screenshot" of a virtual screen of a size different from the actual one ? Alternatively does threejs support svg as an output for images ?