I think I have hit a limit.
I’m designing a picture frame to be 3D printer, I found an appropriate model to start with, then duplicating and rotating items to create the size and shape I want.
Ive struggled through app crashes but got half the frame done, I’m trying to copy and rotate the last on it, but it just quits, sometimes when I open it it just quits too.
Ive tried simplifying the model by combining parts with union, but that fails too.
How many polygons are in that frame data?
Parametric and polysolid modelers like Shapr are generally not capable of handling highly dense polygonal data.
Juggling 100,000 polygon organic model is about as much bandwidth as if you created 25,000 cubes in Shapr.
Your best bet would be to see if you can simply mitre cut the corners at 45 degrees and be satisfied with models of the the one long side and the one short side- print two copies of each and the assemble them into a frame post-print.
An app better suited to editing STL scan data or organic models on the iPad is Nomad Sculpt… Its one big failing is that it does not have any means to measure the model… So I would model a rough and simple outline model of the picture frame in terms of the dimensions you want- the back side rabbet inset for the glass and picture and other details easy to model and measure in Shapr… then import that model into Nomad- as your size reference and the object you want to be able to accurately subtract from the scan data of the frame.
Then import your original frame data into Nomad and scale it to fit the objects you modeled in Shapr. This will give you at least one known reference size object to judge the scaling of the frame. You will find that Nomad enables you to stretch or compress the model in any dimension to get it to fit your picture glass, as well as do Boolean operations to cut other model and primitive shapes from the organic model data.
Then you can export STL or OBJ from Nomad to go to print. The one caveat would be to pay attention to the Units you have shapr set to for modeling the glass inset or other size reference objects you will import into Nomad.
When you import the file you saved from Nomad into your printer software- make sure the printer software’s modeling space is set to the same units you used in shapr, and the model SHOULD come in the correct size.
But I would double check by measuring the model in the printer software and scaling it to correct if necessary.