Cool effect: http://depthy.stamina.pl/#/sample/mango
Converted this few lines into unity shader:
https://gist.github.com/bozzin/5895d97130e148e66b88ff4c92535b59
Finished shader (unlit, build in pipeline) + mouse position script:
https://gist.github.com/unitycoder/696a07c9de34e6a8fd28dc7de2362501