There are numerous 3d assets across my three 3d asset packs, which also include related texture maps and a small number of video clips related to the themes of the collections (falling leaves, falling snow, rainfall, dust/sand overlays).

These three asset packs are mostly focused on 3d foliage, however, for particular ranges of terrain. The asset packs are called 'Marshes & Meadows', 'Forests & Flowers' and 'Snow & Sand'.  They are available on a DVD via eBay, or as immediate digital downloads on Itch.IO.
The banner links at the bottom of each page include links to my own webpages, links to my storefronts/shops online, and occasional links to other [third-party] verifiably legitimate stores and services I've hand-picked, vetted, and used myself. 
That said, I'll openly disclose that when you buy something from another vendor using these links, for example, a link to Amazon.com, I will get a small fraction of the sale amount and will use that as a means of supporting and expanding the projects I'm working on here. These ads for other vendors, as well as - especially! - links to my own shops, are helping me keep these sites online and growing with new content on a more frequent basis.