That was a timed maze. An abomination to be sure, but not really a pixel hunt. There was another thing like that in Dracula Sanctuary.

Best pixel hunt I've had was the one from "The Mistery.
The fourth level called "The Soulkeepers Grave"
should have been called the "Mistery Pixel Hunt"!!! Go ahead and test your skill...There are nine things to find. The Soul Keepers Grave

Inferno

"Lighthouse" is a pixel hunt even with the partial cursor highlighting available in version 2.

Thanks someone for mentioning the grapnelling in "Amerzone" - that caused me to give up first time round.