Phantasm

From D20advanced

PHANTASM		-1 Modifier

This flaw applies to FX like Concealment, Illusion, Morph, Obscure, and others that alter how things appear. A phantasmal FX controls how others perceive things rather than creating an actual, physical, FX. A phantasm has no effect on a mindless subject (like most machines) and must overcome a target's Will resistance to have effect if an observer has any reason to believe it isn't what it appears (just like detecting an illusion). Phantasm includes a measure of the Resistance Allowed flaw, so it doesn’t apply, although Additional Resistance may.

d20 Advanced: Part I
Chapter I: The Basics	What is d20 Advanced? | The Basics | Gameplay | Hero Dice | Character Points | Details & Characteristics | Drawbacks
Chapter II: Abilities	Generating Ability Scores | The Abilities | Altering Ability Scores | Movement | Size
Chapter III: Skills	Skill Basics | How Skills Work | Skill Descriptions | Combat Skills | Resistances | Creating Skills
Chapter IV: Feats	Acquiring Feats | Feat Descriptions | Fighting Styles | Creating Feats
Chapter V: FX	FX Components | FX Types | Using FX | Noticing FX | Countering FX | FX Descriptions | FX Feats | FX Modifiers | Extras | Flaws | FX Drawbacks | Drawback Descriptions | FX Structures | Creating FX | Improving and Adding FX
Chapter VI: Gear	Equipment | General Equipment | Weapons | Armor | Vehicles | Structures | Devices | Constructs | Wealth
Part I: Characters | Part II: Action | Part III: Running the Game