Thank you to all the programmers.
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That turned out quite well 
If you are able, you could go back and take some images of the walls with camera at ~ -45° to fill in the blank spots, and it may fix some of the roof irregularities too.
What settings did you use?
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That was flown with pix4d capture, double grid, I have not found a way to change camera settings with pix4d. The roof is couragated which odm handled well in my opinion. This time of year, shadows are the challenge.
Yes wall images, thanks for the suggestion, The client wanted the roof, I went a little overboard…but I just love it.
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Manual flying is the answer 
I do it quite a bit of it to fill in areas that need a bit more coverage than automated flights can easily deliver.
Repeating patterns like corrugated iron roofing are a bit tricky, but often using ultra feature extraction and point cloud can give a very good result, with minimal distorted patches.
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Like Gordon says, manual is a good way to fill the hole, but you can also vary camera angle in Pix4Dcapture like so:
Then you’ve got a slider for camera angle:
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Gordon, if I first do a double grid at 200 feet agl, what distance should I fly from the building to capture manual side views? The building I’d like to 3D model is within a grove of trees, less than 200’ away. (using a Phantom 4 Pro)
thanks!
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Welcome to the ODM community Carl
It isn’t so important to fly at a specific distance as it is to make sure you have full coverage of everything you want to see in the point cloud, making sure you have plenty of common features in overlapping images. You really want each point to be in view in at least 3 images, ideally covering more than just 3 adjacent images.
For the walls, from a range of 100-150’ would be fine, avoiding sky if possible. Photos at minus 60, -45 and even -20° if required will all help. Get some good corner views too, not just square on to the sides.
You’ll probably have better results if at least one of overhead flights is at -75 or -80°
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So much good information here. what a fantastic community you have. Clearly, some of you are wizards.
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