Maxwell Render | Official public forum

Are in the payed version hdri and sky image options included?

Yep... aside from the omitting of anything specifically related only to Maxwell Studio, MXS files, Network Rendering, and MXED it's basically the same package.

Best,
Jason.

Also worth mentioning: it is limited to HD output resolution, with rendering (obviously) only in the Maxwell Fire window, so no channels, multilight, etc. Theoretically, it is intended for artists, serious hobbyists, and professionals with minimal requirements -- people who want Maxwell quality in HD resolution, with the benefits of the Production engine, but who can afford to trade the flexibility and increased productivity of a full Maxwell Render Suite seat for a substantially lower price point. For more information on this, see here.