Great work by Jung-Won Park.

A tutorial that shows how to simulate a caustic balloon effect can be found below.

MtoA     MAXtoA     HtoA    C4DtoA     KtoA

Industry expert Arvid Schneider shares his knowledge and expertise on Shading and Lighting.

https://www.udemy.com/arnold-fundamentals/?couponCode=YOUTUBE-SUBS-SPECIAL

https://cgbookcase.com/

http://www.sharetextures.com/

https://texturehaven.com/

http://on-demand.gputechconf.com/siggraph/2018/video/sig1812-4-adrien-herubal-arnold-on-the-gpu.html

https://antongorlin.com/blog/photography-composition-definitive-guide/

http://compositionstudy.com/

Another (more advanced) tutorial that covers how to create a caustic effect (swimming pool) using the Cell Noise shader. Many thanks to Slava Sych for this tutorial.

Tutorials here:

MtoA     MAXtoA     C4DtoA     HtoA     KtoA

https://www.artstation.com/artwork/ErW5v