https://community.graphisoft.com/t5/Collaboration-with-other/IFC-amp-layers-priority/m-p/166330#M19111 I asked the IFC guys at GS and this is what I was told:<BR /> <BR /> The IFC schema does not store layer intersection priorities so that is already causing this situation.<BR /> Also, saving the extended and custom PSETs have no effect on Wall intersections.<BR /> Nevertheless, there may be some errors in the data structure as well so this issue has been forwarded to the developers. Tue, 06 Jul 2010 15:38:49 GMT Laszlo Nagy 2010-07-06T15:38:49Z https://community.graphisoft.com/t5/Collaboration-with-other/IFC-amp-layers-priority/m-p/166329#M19110 <DIV class="actalk-migrated-content"><T>Hello everybody ! <BR /> <BR /> First of all, please excuse me for the language mistakes I'm probably going to make since I'm French and quite not sure of my English. <BR /> I'm a future engineer who is doing an internship in a building company in order to study the IFC format and his possible applications in work methods. <BR /> <BR /> To have a work file, I've drawn with AC13 four exterior walls, one interior wall which separates my interior space in two rooms, and a basic slab. <BR /> I've set the priority of the unique layer of the interior wall to a specific value so that the latter stops at the border between the isolating layer and the concrete layer of the exterior walls. <BR /> <BR /> I've exported the whole thing in IFC2x3 with all the Property Sets activated, and the Extended Properties activated (so an AC13 PSet is added to have a better reimport). The trouble is when I reimport the .ifc file, the interior wall stops at the intersection with the exterior wall, which is not what I want. Have I done something wrong ? Is there a way to be sure that the layers' priorities are effectively exported in the IFC file ? <BR /> <BR /> If I'm not clear enough, please let me know. <BR /> Thank you in advance for your help.</T></DIV> Thu, 01 Jul 2010 13:16:03 GMT https://community.graphisoft.com/t5/Collaboration-with-other/IFC-amp-layers-priority/m-p/166329#M19110 Anonymous 2010-07-01T13:16:03Z https://community.graphisoft.com/t5/Collaboration-with-other/IFC-amp-layers-priority/m-p/166330#M19111 I asked the IFC guys at GS and this is what I was told:<BR /> <BR /> The IFC schema does not store layer intersection priorities so that is already causing this situation.<BR /> Also, saving the extended and custom PSETs have no effect on Wall intersections.<BR /> Nevertheless, there may be some errors in the data structure as well so this issue has been forwarded to the developers. Tue, 06 Jul 2010 15:38:49 GMT https://community.graphisoft.com/t5/Collaboration-with-other/IFC-amp-layers-priority/m-p/166330#M19111 Laszlo Nagy 2010-07-06T15:38:49Z