Wierd colour casts around the image (DJI Mini 2 Drone)

[Peter]

That is colour shading. From my OnePlus Nord 3 5G it is corrected in darktable, but OpcodeList3 that DJI uses is not supported.

Looking for samples - smartphone DNGs with embedded GainMap

The OpcodeList3 in this DNG contains a GainMap opcode which applies both vignetting and color shading correction. It also contains a WarpRectilinear opcode which in theory could correct distortion and CA, but in this file the tag values do nothing and it could have been left out. The file is valid, but it won’t work with the GainMap implementation that I added to darktable 4.0 because that implementation only works with GainMap in OpcodeList2 (before demosaic) and this one is in OpcodeList3 (af…