Looking for some guidance here. I created a 3D model from around 290 photos of the portico at University College London (I’m working with their Geomatics department). This was done with a Phantom4, using mostly obliques, but also some Nadir. All done in free flight, but with plenty of overlap. After the initial run of steps 1 and 2 the model came out as shown below:
Putting aside the issues of sky, this looks very poor in my opinion. For example, look at the steps in front of the portico.
I then painstakingly did the annotation to all the photos with sky showing and re-ran step 2 but this appears to have introduced some further issues, as shown in the following 2 screen grabs. For example, the rear of the domed roof is very disappointing (far worse than before I did the annotation).
By comparison, I ran the same photos through Drone Deploy (the free version) and got a really good model and did not even have to bother with annotations:
So, my question is, what am I doing wrong?