Hi Tom, [quote user="fostertom"] First, just to model, then Drawings, Illustrations, but not Quantification. I don't need (or trust) Implied Relations – prefer to extend, trim, re-connect as I go, maybe with ability to re-apply 64bit MS Feature cuts. [/quote] So if you don't need quantification why struggle? Just use standard smart solids which you can dice and slice without needing to know which face is top, etc. then apply family and part definitions to obtain the desired symbology when cut or rendered. My initial reaction to the new upward cranked roof and it's intersections with the existing structures is to model with standard MicroStation 3D solids tools, applying the parts afterwards. However I had a look at how compound walls would work with the overhanging first floor (is that bit new too?). I didn't create a stud wall type, just used one of the delivered cavity walls for speed. The gable with it's projecting outer leaf is easy, with a profile of the sprocketed roof extruded to a surface, the top of the wall can be extended up to it. Turn off the Graphic Group Lock (in the Icon Locks Toolbar), the outer leaf can then be extended independently by a specified distance. For the roof itself, I created a compound wall of the appropriate build up, then an ACS by points (see my ACS (Auxiliary Coordinate Systems) blog) aligned to the roof. I placed the roof using the previously created construction plane, then again with Graphic group lock off, on one side deleted the spocket sections of insulation and plasterboard, used Modify > Extend a Linear Form (because the edges of the roof are sides of the forms, gables are top and bottom) to extend the main insulation and plasterboard leaves, leaving the roof covering sprocketed. Rafters could be added if appropriate (although they are not part of your design, I'm just seeing what is possible here). Yes, changes to the product are desirable, but there is a lot we can do within the existing toolset. In my view the key strength of ABD is that we have BIM tools that do lots of rectilinear stuff (as discussed above) easily but when we run into more complex geometries we have the full range of 3D modelling tools from MicroStation. I could go on but it's Friday and too late already.... take a look at the sample attached. (Please visit the site to view this file)
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