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silvermace

HDR/Glow -- Whats the diff? [Demo + Screens Included!]

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Hi all, i've just been playing around with some "post process" screen effects.. ie. HDR-like glow. here are my results! and here is the demo exe if any one wants to see it in action (Requires some DX9 hardware [Tested on R9500Pro, GF5900XT) my question is this, as you can see from the screenshot, it looks quite "glow-ey"; besides the slight blur and soft look of glow, whats the difference with True HDR? cheers, Danu

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Well, there's no way to represent "true HDR" on commercially available monitors, because monitors are incapable of dynamic range. Glow and saturate-to-white are pretty much just useful ways of faking it.

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yea, i was wondering about the currently availible processes
such as the one in the Dx9 SDK.

what are the benifits of doing it "correctly" ?

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Well , the difference is that you start from low range texture and that you scale it to obtain a HDRI look.

HDRI use a texture containing much more informations about lighting that a simple RGB texture. It uses values that are not clamped to 1. Then when rendering you have to choose only a range in this HDR values.

You sample "looks like" HDRI, but it is not, since interaction with light will not be the same.

Cédric

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