# We now have equation support on this Discourse site

So we can now write:

The rendering equation is

I(x,x') = g(x,x') \left[ \epsilon(x,x') + \int_{S} \rho(x,x',x'') I(x',x'') dx'' \right]

where:

I(x,x') is the related to the intensity of light passing from
point x' to point x

g(x,x') is a “geometry” term

\epsilon(x,x') is related to the intensity of emitted light from x' to x

\rho(x,x',x'') is related to the intensity of light scattered from x'' to x
by a patch of surface at x'

Markdown:

The rendering equation is

$$I(x,x') = g(x,x') \left[ \epsilon(x,x') + \int_{S} \rho(x,x',x'') I(x',x'') dx'' \right]$$

where:

$I(x,x')$ is the related to the intensity of light passing from
point $x'$ to point $x$

$g(x,x')$ is a “geometry” term

$\epsilon(x,x')$ is related to the intensity of emitted light from $x'$ to $x$

$\rho(x,x',x'')$ is related to the intensity of light scattered from $x''$ to $x$
by a patch of surface at $x'$


Thank you to Dan Fuller of LBNL.

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AsciiMath also works:

I(x,x') = g(x,x') [ ϵ(x,x') + int_S rho(x,x',x″) I(x',x″) dx″]

Markdown:

%I(x,x') = g(x,x') [ϵ(x,x') + int_S rho(x,x',x″) I(x',x″) dx″]%


(Note use of Unicode epsilon and double prime characters - AsciiMath is really UnicodeMath.)

This is great! Particularly for those dinosaurs among us who still know TeX. Thanks Dan and Randolph!

–Roland

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