Here at step 11 states:
It is also important to make sure that the physical dimensions of your real-world object matches the Model Target Physical Length, Width and Height.
And here also mentions:
The size of the target needs to match the size of the object in real life
As long as the 3D scene scales are correct, then why is it so important to get the physical measurements correct?
I'm working with small target objects, a 12x12x12cm multi target cube and now i want to add a 2 x 3.5 x 5.5cm model to the scene. If i work as 1 unit = 1 meter, then the scale on the main multitarget would be 0.12, and everything rendered on that even smaller. I don't prefer to work at such a small scale, you often would tweak values that are in the thousandths decimal place, and the unity physics system functions better if you work at a scale that is based around 1.
So for that reason i setup my multitarget model as being 10x10x10 meters large, and this works great. However this means to match the scene, i will need to scale up the 3D Model Target. When i do this in Unity, it then becomes a 1.6 x 4.5 x 2.8 meter model.
So my question is, will having a 3D model/environment that is 83 times larger than the real world equivalent, still work for model targets? I haven't printed the model yet, so i wanted to confirm this beforehand.