Following the advice of @catweasel
I need some helps to convert the nice Infinite City from Shadertoy https://www.shadertoy.com/view/4df3DS
Following some example I already change all vecs to floats.
I was planning also to insert a texture to replace the 2 iChannel used on the site.
Thanks in advance for you help/advice’s.
PS Changed the content of the zip
Now only warning remaining, but no output