An easy node surface to create open cracks on a low poly mesh object.
Pretty cool, I learned a thing or two from looking at it. I think it needs to be CC-BY-NC-SA though.
I found the following when I searched for your HDR:
The HDR images in this directory are provided from sIBL Archive under the
Creative Commons license (CC BY-NC-SA 3.0 US). Please see the page below for
But the HDR is only used for the reflections, maybe find a CC0 one and then blur it a little?
Or just not include and then tell people where to download it? It's called 'Shiodome Stairs'.