A brief behind-the-scenes look at Toril GIS, where the Underdark comes to life through layered data, cartographic experimentation, and a bit of GIS wizardry.

The video shows navigation through the Underdark layers in QGIS, dynamically toggling visibility across Upperdark, Middledark, and Lowerdark levels, and switching between interface languages.

Layer visibility and transparency are controlled via the project variables, combined with data-driven expressions in the symbology.

The cartographic style shown here is not final — this is a workshop peek into how things look inside the mapmaker’s forge.