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If you put up an .sh3d file for download, with something as close as possible to what you want to achieve, I can try and see where you are stuck.
---------------------------------------- Dodecagon.nl 950+ 3D models, manuals, and projects
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English: You made a few mistakes. Your end goal is to get a roof with the window, notice 'roof with window'. You tried to create a stand-alone tilted window that you can insert into the roof but that doesn't work, you have to create the whole object: roof+window.
First modify the window to the size you want and set the colors and/or textures you want. Then draw the wall horizontally. Set the size and thickness you want the roof to be and set the colors and/or textures. Insert the window in the wall at the position you want: elevation and left/right from the sides of the wall. (Make sure the inside points north as in the example) So far you have not tilted or rotated anything! The wall+window are still oriented horizontal and upright like a normal wall.
Now export the wall+window, not the window alone but both the wall and the window. Import the created object. This is the roof(wall)+window. No need to check 'Door or window', that was just needed for inserting the window in the wall so it creates a hole and the window you used already has that. There's no need to un-check 'Moveable', if it's checked with any object leave it. Now tilt the object 49°. That is your roof+window. You can use it like that or you can export and import it so the tilt is fixed. (If you want to first export your window, keep it vertical and with the size and colors you want. If you import just that window you need to check 'Door or window' so it can create a hole in a wall before you export the roof+window.)
Now why you lost your glass. When you export an object it not only creates a .obj file but also a .mtl file with the same name. By-the-way, be careful with using the ° character in the file name, it might create problems using the files. It's best to limit yourself to characters, numbers, _, and -. The .mtl file contains the material definitions. If you look in the .obj file you will see lines with "usemtl ...". That is a reference to the material described in the .mtl file with blocks starting with "newmtl ...". You probably lost your glass because the importer couldn't find the .mtl file when importing. Did you move the .obj file without the .mtl file before import? If not the ° character in the file name might be the problem. Always move both the .obj and .mtl together. You can even zip them together and import the zip file so one doesn't get lost.
---------------------------------------- Dodecagon.nl 950+ 3D models, manuals, and projects
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English: Success, bravo! If you want the 3 windows in the patio roof to open individually, but in a single roof object (all three in a single wall), you will have to do some extra work. Let me know if that is the case and I will explain how.
---------------------------------------- Dodecagon.nl 950+ 3D models, manuals, and projects
