Not sure if that was already before but after updating to latest release of Pix4D Mapper and re-processing a mission (after adding manual tie points) i’ve several red dots / pixel in the ray cloud. They are spreaded all over the map.
Do they have some special meaning? (e.g. not enough image information at this pixel)
If a pixel is not found, then is not created, red big dots are cameras that have not been calibrated.
If you place a screenshot somewhere and share the link, then I can see in more detail…