Like CHL said, but when you get a scan body that has a dim you can print like NT trading or ELOS then first get the formlab dme for 3shape.
https://support.formlabs.com/hc/en-us/articles/115000673010#3shape Then go into your control panel and import the DME and set the analog to model setting to 0.00 on all 3 profiles, loose, medium and tighter.
Here is what i have found thus far. Medium at 25 micron best fit, no wiggle on dim analog. Down side print times take 16 plus hours to print a quad with soft tissue.
Tighter profile at 50 microns prefect fir as well but slight movement under over tightening.
Tighter profile on 25 micron too tight to the point where we had to press the analog in with scan body atatched with a good amount of pressure.
I always use supports to print model and the soft tissue i simply leave flat on the build plate. this way i get a flat surface on the bottom side so it sits flat on the model. When i place supports on the tissue piece it is rounded and doesn't sit for a damn on the model. I also brought down my base setting and the distance fronm the base to the object in support size to save a few mm's of printing.
Now if you are on exocad can't help you there. sorry only work on 3shape.
but the biggest thing to change is the analog to model distance make it 0.00 or on the tighter one maybe maybe trial and error at a much lower setting then forms has set up if your gonna print 25micron it not leave it at 0.00 for 50 micron on tighter.
good luck took me about 3/4 of a model resin tank to dial in my settings and figure out proper nest cause i had 3 to 4 failed prints with out supports on the model and leave them flat on the plat hollow or not, the model resin is different then the gray and white resins.