Hi Yuri,
Yes, sorry I should have explained that I already tried overlaying it as you suggested. See the attached image.
In the current image there are two frames, the above frame displays a transparent background, but is achieved using different WebGL software. As for the one below, it’s using Verge3D with the Transparent Background enabled but not working.
Both are set up exactly the same using embed <iframe> code method in regards to the HTML editor.
As stated before, I can’t explain the behavior?
Thanks,
PD