Lua Shader Exponential Functions

Function	Syntax	Description
pow	pow(x,y)	Returns x raised to the y power.
exp	exp(x)	Returns the natural exponentiation of x.
log	log(x)	Returns the natural logarithm of x.
exp2	exp2(x)	Returns 2 raised to the x power.
log2	log2(x)	Returns the base 2 logarithm of x.
sqrt	sqrt(x)	Returns the square root of x.
isqrt	isqrt(x)	Returns the inverse square root of x.

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