Amber's Secret Cove is an etsy shop run by Barb & Jolly Blackburn (of KenzerCo/Knights of the Dinner Table fame). What I really like about the terrain items they make is the fact that most of the pieces seem a bit clunky, or "off". This adds a lot of charm to the pieces and makes them seem more realistic, at least to me.
Inked Adventures is a cool collection of hand-drawn dungeon tiles and assorted terrain pieces by Billiam Babble. Pretty cool artwork that is pretty easy to work with as well. Some of his newer designs are in black & white line art so you can easily (and cheaply) print it out at home if you don't have a great color printer.
MapForge is a battlemap creator for Mac and Windows PCs, supported by a vast library of mapping assets covering various genres. Generates output suitable for printing or use in any virtual tabletop (VTT). Free version available, but a license is required for high-resolution output.
Dyson's Doceahedron is a great little blog whose author likes to created old-school maps. The thing is, he is great at it and he pretty much releases all of these maps out into the wild. I really doubt you'll not love his site.
Rae'Chel Does Some...Stuff is a new (April 2023) channel that only has a couple of videos, but the production value is good, the craft is cool, and she approaches a couple things from a different perspective.
Dungeons & Gluesticks is a terrain building channel in the flavor of The DM's Craft, but the builds are different enough that these videos are a great addition to the other channel. There are also some more complex builds that seem easier to tackle with guidance
Grey Tower Games is yet another building channel, but most of the builds involve much different materials and processes than the channels listed above.
Game Terrain Engineering is a terrain building channel from a regular Make Magazine contributor.
Luke's APS (Affordable Painting Service) is a custom terrain & mini channel with some great advice for affordable options in making terrain and minis.
Black Magic Craft is another mini an terrain channel with tons of cool DIY projects that look quite professional.
Quassi's Bell Tower is another crafting channel that has some similar, yet very different builds than some of the earlier channels.
Questing Beast is a bit of a "general" RPG YouTube channel, but I really like the "Fantasy Map Making Tutorials for DnD"
Landvaettr's Lair is a cool channel that makes some seriously high-end DIY terrain. Some pretty sweet builds that look great and seem reasonably attainable.
Tabletop WitchCRAFT is another foam crafter/builder channel, but this channel has a publisher page on DriveThruRPG where you can get some "blueprints" to serve as stencils so you can make your own. Most of these stencils/cutting guides are free or PWYW, but the others are inexpensive.
Real Terrain Hobbies is an interesting channel in that Neil, the host, does what looks like these complicated builds, but he shows just how easy it can be...provided you have the time. His workspace isn't anything special, nor is his tools, but if you follow along you can easily get up to the same builds he does.
Last Updated: 04/04/2023
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