When you say "graphic novels", do you want to: i) use Poser 11's new Comic Book mode or ii) do the graphic novel as photoreal renders? Your question about dynamic lighting and environments suggests you have the latter in mind. As you can see from the Renderosity store, plenty of environments are available in 2019. But you should also be aware before you begin work that it's also perfectly possible to have Poser 'make art' that looks like it was hand-drawn.

A two-second Poser 11 Sketch Designer render, laid right over a one-second Comic Book Preview line-art render. No further work, other than adding a few touches of light colour...

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Learn the Secrets of Poser 11 and Line-art Filters.