In AC3D it's all black, but I can see the alpha shape of the trees, so the texture is loaded. The other, Cattedrale16.ac, seems to have issues with textures. Two of them, apart from the flipped axes, look ok.
There are three models inside Ancona1/Cattedrale Ancona FSX/scenery/AnconaLib.bgl. Here's an FSX model I used (comes from here). Note that models designed in AC3D look the same as in FG. That is, direction is correct, but they're twisted inside out and upside down. If I flip things so that they're correct in AC3D, they're messed up in FG. That is, they're not upside down, but they're on a perpendicular direction (I haven't tested a lot, I rely on your experience to fill the gaps). I had a hard time figuring out, but Y and Z seem to be inverted in AC3D (at least the vertical one), although in FG they're fine. One is with axes, I've read about that on the blog. I'm trying to improve a bit my area in FlightGear and it was a great find! The batch converter is a precious thing and I'm experimenting with it. I downloaded a few days ago the development version of MCX.
So therefore we would like to ask you all to use the following guidelines when posting your questions: But having all questions about FS2020 in one forum becomes a bit messy. Which the release of FS2020 we see an explosition of activity on the forun and of course we are very happy to see this.