[jd callow]

Make a magnification print and you'll see if it is bad film or grain aliasing from the scanner (which imacons are known for especially when the USM is not disabled). I have scanned reala on a flextight and have not seen what you've displayed.

Meanwhile, if it is the film or processing it is a one off, as this film is anything but grainy. Reala is an older film and newer emulsions have been 'optimized' for scanning, which may mean something, but I doubt it. Imacan's use film profiles and the one you used for Reala may have the USM turned up, whereas the the ones used for the other 100iso films may have been turned down or disabled.

This thread is heading in a direction that is out of scope for APUG. If your concern is whether or not the film is suitable for scanning then you need to take it to Hybridphoto or some other suitable forum.