[Tutorial] Few cool things (by Naughty Dog advisement)

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[Tutorial] Few cool features

I read few docs from Naughty Dog on last GDC, and some things pushed me into right direction...
so.
docs
http://twvideo01.ubm-us.net/o1/vault...od_Effects.pdf
http://www.gdcvault.com/play/1015309...-Technology-of
http://twvideo01.ubm-us.net/o1/vault...heTricksUp.pdf
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one cool thing - scrolled texture in bias, for DepthBiasedAlpha, that they use for fire particles.
http://screencast.com/t/qe5xsOAQ

as I see, in UDK it's will be
http://img822.imageshack.us/img822/5585/litpart.jpg

and you will get awesome fire particles material.
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next thing is a fake lit particles, with WorldPosition projection
http://img822.imageshack.us/img822/3913/slpl.jpg

in UDK
http://img51.imageshack.us/img51/4834/udkflp.jpg

it can be scaled or offset with correspond variables in shader.
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