Concealment

When you are concealed, you are hidden from view.

Partial Concealment

When you have partial concealment, creatures suffer a -2 penalty to spot you or perform ranged attacks against you, and you gain a +2 bonus to Stealth checks. It is possible to have partial concealment from some creatures and not others - for example, if you are standing next to a translucent rice-paper wall, you have partial concealment against creatures on the other side of the wall, but not against creatures on the same side of the wall as you.

Total Concealment

When you have total concealment, creatures suffer a -5 penalty to spot you or perform any attacks against you, and you gain a +5 bonus to Stealth checks. It is possible to be hidden from some creatures and not others - for example, if you are in total darkness, you have total concealment from creatures that rely on normal vision to see, but not against creatures with darkvision.