… and purged unused stuff although there doesn’t seem to be much unused.
I also looked at resizing materials. Loads of excessively large texture images. Many duplicates, too. There must be a couple of dozen cactus materials that all look exactly the same. There are three materials that are identical images of an airplane where one material would do the job. Many other cases of duplicates of textures. These are the largest ones. I resized the 146 largest ones.
The file is still huge and slow. Hopefully you’ll be able to open it. You should go through all of the components and look at putting them on a diet. Or replace the overly detailed ones with much lighter ones. You also need to look at face orientation and correct the exposed back faces. For example this thing on the wall has all blue back faces out. They should be reversed.
I would consider getting rid of or replacing all the overly detailed plants on the front of the building and the roof. They are killing your model. And do you really need that giant faucet tap over there on the left?
I deleted a bunch of plants and reduced the size of another 100 materials. I got the file size down by about a third. Still it ought to be smaller. More that needs doing.
I did remove the plants from the roof and the walls. At least the roof could use a texture to imply a thatched roof.
The style is set to Monochrom so your graphics card doesn’t have to work so hard. I didn’t remove any materials. Best to do your modeling in Monochrome so you can make sure you get face orientations correct. Back faces can be problematic in renders.
Hey DaveR. As I can see you have solved this problem “Failed to open the document”. I am having the same problem. And it is a really important file for me. Please help me, brother.