Hello @JesseJiang010
- Basically, the minimal amount of images is 2. But this won’t be enough. For such thing you will need to follow the basic photogrammetry recommendations, which can be find here: Introduction to Photogrammetry | Course. Then it all depends on used camera, lens, distance form the face, overlap.
- For optimal capturing you will need to use camera rig which will capture all images in the same time. Also, it would be good to have lighting without shadows and not shiny face. You can also use the layers workflow there. Also, capture without hair or beard.
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- Basically yes, but you can use make-up for example or mentioned layers workflow