Hi Michael,
It is not possible to capture RAW or DNG images with Pix4Dcapture because these image formats are not compatible with our software, Pix4D Desktop. We only support .jpeg and .tif. If RAW imagery is selected in DJI GO (4), it will not be taken into account in Pix4Dcapture.
From our and users’ experience, processing .jpeg images generate a model with high precision. However, we have forwarded this suggestion to our product team for the mobile application.
I would also recommend checking this community post for more information.
Best,