Browser optimized interactive electronic model based determination of attributes of a structure

An interactive 3D electronic representation of a physical scene is executed in a browser. The browser has a limited computing capability compared to a native application or hardware usable by the computer. The interactive 3D representation is configured to minimize overall computing resources and processing time. Attributes of data items corresponding to surfaces and/or contents in the physical scene are extracted from the interactive 3D representation. Interactive verification of the attributes of the subset of data items is performed in the browser by: flattening a selected view of a ceiling, floor, or wall two dimensions; receiving user adjustments (if needed) to the dimensions and/or locations of the selected ceiling, floor, or wall; receiving user indications (if needed) of cut outs in the selected ceiling, floor, or wall; and updating the interactive 3D representation based on adjustments to the dimensions and/or locations, and/or the indications of cut outs.