I'm watching a documentary series called "Time of Death." It follows six terminally ill people and their families through the dying-death-funeral process.
One woman who died was cremated, and her father and daughter went to the cremation. There wasn't anything grisly to see: just two attendants moving the box containing her body through a small door toward the crematorium. Once the box was through, the door shut. It seemed no harder to take than, say, an open-casket funeral, but would you find it too harsh?
(The image is just a random I found; not from the show. It looked pretty much like this, though the crematorium was set farther back, and the body was in a cardboard box.)