And if you wanted to filter direct sunlight, you'd need to do it in a way that preserved the spectra (e.g., holding sunglasses above the letters wouldn't do it because common sunglasses only reduce a limited spectra of sunlight, not all of it). But we could limit the exposure to light the same spectra as sunlight, meaning if you have weak enough sunlight the ink would appear but light from a flashlight that wasn't specially designed to mimic sunlight wouldn't do it.

Unfortunately, we can't limit it to just moonlight because moonlight and sunlight really are the same thing. But that's the point of fantasy, right? (I'm assuming you're pulling this question from the moon letters in The Hobbit.)Īnd when we open the door to suspension-of-disbelief what we get is an ink that will only be visible with limited light.

What you really want is suspension-of-disbeliefĪnd Tolkien's books, great as they are, require a lot of suspension-of-disbelief. Invisible, Inc.Frame Challenge: Real life is boring and frequently too limiting.In addition, to celebrate our ten years, our entire collection of games will be on discount at up 85% off.

It's been 10 years for us as a studio making original games and we're celebrating with a Steam Weekend Sale where players can try every single one of our games for free all weekend long! Steam Weekend Sale to Celebrate 10 Years of Klei! Likewise, corporations have added a variety of new threats and challenges to test players skills in a new extended campaign.

Players will be able to explore new strategies with four new agents, two new starting programs, new weapons, items, and augments. Contingency Plan, the new expansion to Invisible, Inc., is available now on PC, Mac and Linux for 4.99 USD!

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