After much debating within my own group and a hard time to convince them that a Invisibility spell don’t cancel the outlining effect of a previously cast Glitterdust spell, I have formulated my reasoning like this:
First:
The Glitterdust particles emit light. The spell description doesn’t state that the spell is useless in total darkness. A to big exception not to have in the describing text.
I see them like sparkles from a fire, they don’t illuminate anything but their own small space but they are clearly visibly, especially in darkness. Glitterdust have higher intensity and is therefore visibly in daylight and initially can blind it’s target.
Secondly:
“Light, however, never becomes invisible, although a source of light can become so (thus, the effect is that of a light with no visible source)”, the SRD states. Since the Glitterdust particles don’t illuminate anything put their own small space the sparkles are still visible at their original location on the target.
Ergo, the outlining effect is not cancelled.
What say ye?
- Mattias