One thing to check, because I am not sure how it is now, but in the past Oly has this thing where their older software (what was it before Workspace, "Master"?) they would update it to add new features supported in new cameras so you could apply the same things to RAWs on the computer as you could in the camera, but ONLY if the raw came from a camera that supported that feature. So if you wanted to apply an art filter to raw files from an older model that didn't have art filter, the SW would not let you. So I wonder if the same thing is try for the 8mm de-fishing. If your camera does not support in camera de-fishing then are the raws locked out of this feature in Workspace?