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I did a synth of my dorm area (hidden to the public as I have to blur windows, faces, etc..). Later on I took more pictures and added them to a new synth. Those pictures are mostly pictures of the ground like green gras, .. Now when I navigate to certain areas of the synth, it gets flipped upside down or rotates. Is there any possibility to tell Photosynth what site of the pictures (they are all equally oriented) is top and which one is bottom?
See this topic, please:
If that doesn't answer your questions, please feel free to ask more.
So if I want my point cloud to be correct I need to take more photos, right?
Well, it's difficult for me to say, not having seen your synth.
It might just require a different pattern of photos, rather than a higher number.
That said, if you uploaded all of the photos right side up, you can at least get rid of the tilting on the images in your existing synth by using the synth editor, even though this won't make navigation any easier if the point cloud is incorrect.
You could probably even overcome navigation problems by providing highlights to portions of the synth which are correctly reconstructed (such as individual rooms).