This isn't how Rudeus' power works, he was using his Eye of Foresight to see into the near future where Sylphie and Roxy entered the room and saw the scene before them, which present day Rudeus noticed and prevented his wives from seeing his older self.

What's happening with one of the hands of the grey haired elf girl? It kind of merges with the lantern, I wonder why.

bythewayiknoweverything said in comment #2630792:

What's happening with one of the hands of the grey haired elf girl? It kind of merges with the lantern, I wonder why.

Because drawing hands is hard.

Cy_Man said in comment #2630788:

This isn't how Rudeus' power works, he was using his Eye of Foresight to see into the near future where Sylphie and Roxy entered the room and saw the scene before them, which present day Rudeus noticed and prevented his wives from seeing his older self.

future sight can see after death according to the LN so that may not be all there is

Mandalor_NeO said in comment #2632357:

future sight can see after death according to the LN so that may not be all there is

Considering Future Rudeus died before they entered the room, and the following episode did confirm that what I described is what happened that he saw, yes, the Eye of Foresight can see a bit further past the user's death. But my main point is that the Eye of Foresight isn't X-ray vision.