I have been using QGIS 2.8.1 to map an archaeological project and I have now installed Midvatten 1.4.6 with the aim of visualizing the stratigraphy from various test pits using qgis2threejs.
After creating the Midvatten database, I have made up some dummy test data for a single pit, loaded the pit name as "obsid" and its position into table "obs points" and the test stratigraphy data into "stratigraphy". By selecting the test pit, I can obtain a stratigraphy plot from Midvatten.
My problem arises when I use "Midvatten> Utilities> Prepare 3D-data for Qgis2threejs plugin". I see that the data layers are generated but the stratigraphy does not appear in the qgis2threejs visualization and on inspection I find that the 3D-data tables are completely empty of any attributes.