https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/143001#M76715 Do the Polycount, check the number of polygons in the model.<BR /> <BR /> Try setting all your windows and doors to scale sensitive, hide all the layers that you actually don't see, remove doorknobs etc, simple 3D for the trees ....<BR /> <BR /> Then, set your 3D view to a 1:500 or 1:1000 scale.<BR /> <BR /> Do the Polycount again. If the number is significantly down, you are making progress! The Polycount will list all the used library parts, maybe you can make them even less complex. Check the parameters.<BR /> <BR /> And so on ... Tue, 23 Dec 2008 19:01:08 GMT Djordje 2008-12-23T19:01:08Z https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/142997#M76711 <DIV class="actalk-migrated-content"><T>i don't know how to do . I need to save 3d pdf .</T></DIV> Fri, 19 Dec 2008 23:46:24 GMT https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/142997#M76711 Anonymous 2008-12-19T23:46:24Z https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/142998#M76712 It might be that your model is too large. U3D seems only good for small vignettes. Fri, 19 Dec 2008 23:56:24 GMT https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/142998#M76712 Anonymous 2008-12-19T23:56:24Z https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/142999#M76713 How can i do if i need to make 3dpdf with large file? Sat, 20 Dec 2008 09:34:44 GMT https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/142999#M76713 Anonymous 2008-12-20T09:34:44Z https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/143000#M76714 It may not be possible. I don't know the where the limit is, but I have had no trouble with very small files, no luck with very large ones, and no experience with anything in between. Sat, 20 Dec 2008 18:18:37 GMT https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/143000#M76714 Anonymous 2008-12-20T18:18:37Z https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/143001#M76715 Do the Polycount, check the number of polygons in the model.<BR /> <BR /> Try setting all your windows and doors to scale sensitive, hide all the layers that you actually don't see, remove doorknobs etc, simple 3D for the trees ....<BR /> <BR /> Then, set your 3D view to a 1:500 or 1:1000 scale.<BR /> <BR /> Do the Polycount again. If the number is significantly down, you are making progress! The Polycount will list all the used library parts, maybe you can make them even less complex. Check the parameters.<BR /> <BR /> And so on ... Tue, 23 Dec 2008 19:01:08 GMT https://community.graphisoft.com/t5/Modeling/can-t-save-in-u3d-it-s-appear-quot-system-out-of-memory-quot/m-p/143001#M76715 Djordje 2008-12-23T19:01:08Z