The warning message on the 3D analysis page indicates that you have hit a size cap to the maximum amount of geometry data you can analyze with analysis.tool. The warnings appear as:
The project is too complex to proceed with analysis.
Your Project has exceeded 50,000 triangles!
As a web-based application, there is a need to limit the size and complexity of the models being analyzed to ensure that our servers can function properly for all users. analysis.tool does this by limiting the number of triangles (the invisible mesh of vertices and edges that graphics software uses to define the planes in your models) that can be sent to cloud for analysis.
Following here is some general guidance to simplify geometry. Please also refer to the plug-in specific guides for even more help!
Simplify 3D exports by skipping unnecessary geometry
Begin by reviewing your geometry category views in the original 3D model. For analysis purposes, we only need geometry data that best represents the continuous thermal envelope and the interior conditioned spaces. Extra objects that are modeled for planning or aesthetic purposes and have no thermal impact can be skipped. Most early analysis.tool users may have some of the following elements that they should attempt to not export.
floor finishes, landings, staircases, room tags, and exterior elements (balconies, overhangs) should not be exported as floor objects. These should be removed from the export view.
Depending on the platform you are using, you can also use a filter or selection tool to see how many objects are in view. Based on the objects count, you can determine which category may prompt the error again. In the diagram below, we show what a view may look like before and after it is cleaned for a simplified export.
Avoid importing geometry with overtasked details
This describes models or elements, which have incredibly detailed or highly textured surfaces; this includes parametric architecture, frit, perforated shading materials, Revit elements with multiple sweeps/ reveals/ or voids. The typical file size of a general analysis.tool export is less than 10-30 mb, but a file with a high surface count can generate a file size over 300 mb. Note, however, that this issue is one of complexity and not size. analysis.tool can quickly gather details about a skyscraper, but to collect the data needed to recreate a render an intricate louver system can be 30x more tenuous. Try to avoid irregular spheroid forms or other complex geometry as this will slow down the simulation while not increasing accuracy.
Other items that may cause the 50K error include exporting structural elements, trees, and generic models (especially those downloaded from manufacturer or rendering sites) such as street furniture, trees, cars, people, and topography. None of these elements are necessary for analysis.tool.
Happy Modeling!!