[antegamisou]

Probably uses the ACM SIGGRAPH TeX template files.

For example, a recent paper of his team "Repulsive Surfaces" is on arXiv, where the source files of the preprint PDF are available for download

https://arxiv.org/format/2107.01664

[rpmuller]

Wow, you're correct, he uses ACM TOG for the paper. As a scientist, I mostly just use the REVTeX packages or tufts-latex. Evidently there's a brave new world of other templates out there that I need to learn about. Thanks.