Bill The attached files demonstrate what I think you were describing in your original message. All of the changes I made to your files have the tag #B20141112 added to them. I have modified each elevation map to use a different projection. Of course it is ridiculous with this particular example, being essentially straight, but it is the sort of thing one might do for a Tee shaped cave as you originally described. I had to change the projection of each elevation scrap, and this is not something you would usually do after it has been drawn - of course the shape of a scrap depends very much on the projection, and to change the projection later on will usually render it meaningless (although Therion can pull off some amazing morphing). I added debug all to label the scraps, stations and observe the morphing. I also took the opportunity to test the transparent background that I was having trouble with in my datasets - it works! Regards Bruce -----Original Message----- From: therion-bounces@speleo.sk [mailto:therion-bounces@speleo.sk] On Behalf Of Bruce Sent: Wednesday, 12 November 2014 7:29 p.m. To: 'List for Therion users' Subject: Re: [Therion] Multiple elevation maps Hi Bill I think I see your problem. I will potter around with the example you sent to demonstrate what I think you want, but maybe not tonight. For now, you can avoid the 'object not found' error by double clicking on the survey or map item on the right-hand side of XTherion. For example it places... select AllElevations.map@PracticeCave ...at the cursor position in the th-config file. And, if you select multiple maps of one projection, they will all be used in the export for that projection. -Plan is a projection -Extended is a projection (developed or straightened out elevation) see http://therion.speleo.sk/wiki/doku.php/faq#projections_plan_elevation_extend ed_and_none -Elevation is a default for [elevation 000 deg] ie 'looking north'. So assuming there are 360 degrees in a circle there are 360 different elevation projections. If all your elevations have the same projection, all the elevation maps will end up in the same pdf (unless you modify the th-config between runs or use multiple th-configs as Rowena suggests). I will modify your example to demonstrate using two elevation projections (without resorting to indexes). Bruce