360 degree image (equirectangular) projection / cubemap

Max Doe's icon

Hi from Switzerland.

I have been looking in the examples of jit.gl.pbr which does prettyy much what I want:

a geometry with some nice 360 image in the backgrounf

Instead of the .exr file I want to use a simple .jpg (equirectangular).

I saw Federico's "soap bubble" patch doing so but not using Jit.gl.pbr

What do I need to change to use the jit.gl.pbr example with a .jpg image ?

If it is not possible....can I do it like in Federico's example but instead of soap bubble have some

jit.gl.gridshape ?

Thanks in advance and have nice day everybody.