Is not so simple.
1. MTL file (material textures library) is OK to open/edit with notepad.
- newmtl is a kind of tag; the name came after (right_right_90)
- this name are used several times in OBJ file; You must modify both.
- don't care about numbers; it's some codes for color except dose for glass which describe the transparency (d 0.14117646)
- indeed the JPG is the texture but I suggest to not set it until the final step wile we can modify when we use it; use only colors to be more easy identifiable.
2. If You want to use only SH3D and the texturable box You must build step by step: e.g.For simple window:
-fist make the frame (5 boxes), align them correctly, GROUP them and then export as obj.
-edit the MTL and OBJ file by renaming all the textures "frame".
-re import as furniture and in modify texture You must have only one entry "frame".
3. Repeat these procedure for "window", "glass", "knob", "ledge" and "hinge".
4. At the end import them all, arrange correctly, group and export as obj.
5. Import the furniture and see what You do
Otherwise learn AOI and make it there.
I will tray to make a library with windows You suggest; I'm interested in this.
PS. I suppose the knob must be on the other side to be usable.
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A computer program does what you tell it to do, not what you want it to do. Murphy's Law
When all else fails, read the instructions. Murphy's Law
If you don't like "AS IS", DIY. Dorin's law
