Epic has announced this month's free content on the Unreal Engine Marketplace. A small sample of content is below, so be sure to check out the full list!
Fabric Materials
56 unique seamless PBR 4K fabric materials derived from scan data, game and arch vis ready
Multistory Dungeons
Over 200 modular architectural building blocks with props for creating stylized dungeons
View more at https://www.unrealengine.com/en-US/blog/featured-free-marketplace-content---march-2019.