Gaps and holes in 3D model

Hi everyone,

As I am quite new into Bentley, could you please help here?

I did the 3D mapping of the old church using P4ProV2 and did processing in ContextCapture. 
Two sides of the church got reconstructed quite good

 

While the other two have gaps blurry surfaces holes etc


The images were taken from approximately same distance from the object using Pix4D Capture Free flight mission module the distance between the images is ~1m.


Any idea how to troubleshoot/avoid such issues in the future? What could be the culprit here? The overlaps are in my opinion quite good as well there are no missing images that could lead to failure in reconstruction.
What might be the problem here is the fact both sides which failed were exposed to direct sunlight while the other sides which are okay were in shadow, but not sure whether that fact plays such a role.

As well I see in 3D view some of the images are green (reconstruction went fine) and some are orange (the results are bad). What that means, any idea?


Thanks everyone in advance for your help.

Best,
Zoran