I've just released a new pack of professionally terrain sheets for creating 2.5D dungeons. The sheets in the pack were created by Kristian Richards of Crooked Staff Publishing. The first pack in the range contains 24 A4-sized sheets of terrain printed on 170gsm silk art paper. There are 12 sheets of flooring texture and 12 sheets for creating wall, doors, columns, alters, tables and other stone/wooden items.
All you need to add to the kit to make your dungeon is some thick card or foam board, a sharp knife (please take care when making cuts) and metal ruler, and a glue stick. As a launch offer you can buy a special triple pack of the terrain and receive a free aluminium ruler and a large glue stick.
Get them here: https://squarehex.myshopify.com/collections/all/2-5d-dungeon
Also check out Kristian's helpful video tutorials here: https://www.youtube.com/c/CrookedStaffTerrain