public:
     __property D3DVALUE Phi = { read=FGetPhi, write=FSetPhi, nodefault };

• Description
• See Also

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The Phi property contains a D3DVALUE defining the angle, in radians, representing the outer edge of the spotlight's penumbra.

Points outside the penumbra are not lit by the spotlight.
Points inside the penumbra and outside the umbra are illuminated with an intensity relative to their position and the Falloff value.
The value can range from 0 to pi and must equal or exceed the value of the Theta property.

TD3DLight