Terror Subterra by Roger Shepard
It certainly does not appear to be true, but the two monsters shown in this illustration are identical in size. It looks like the monster in the background is significantly larger than the one in the foreground (maybe even twice the size). This was originally published in Roger Shepard’s book “Mind Sights” in 1990. In this book, Shepard asks the following question:
…do we also interpret their identical faces as expressing different emotions — such as rage on the part of the pursuer and fear on the part of the pursued?
To me, they both appear to have the same expression – fear. What do you think?