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Member Since 25 Feb 2008
Offline Last Active Jul 15 2016 01:43 AM

Posts I've Made

In Topic: ddx, ddy reuse for better performance?

06 July 2016 - 09:45 AM

I think you should recalculate ddx/ddy after the offsets (from POM) have been added to the texcoords.

As the offsets are different between pixels, this results in different UVs (to sample base maps) and this results in different derivatives.

So as you have to calculate them anyway, you might as well use tex2D.


You can probably derive a scaling factor (from the offsets) to apply to the baseUV ddx/ddy (and that will likely be cheaper than recalculating)

In Topic: Understanding better the 3D texture coordinate?

22 December 2015 - 03:45 AM

and in case you sample from a texture array, the r-coordinate is the array slice.

In Topic: Banding Problem

02 October 2015 - 01:27 AM

perhaps you already seen it but I think this presentation gives some solutions to fix banding.

In Topic: Best engine for cinematics?

15 July 2015 - 06:19 AM

You could take a look at Crytek's Cinebox, 

All the tech from CryEngine (and much, much more) inside an application specifically targeting animation / previs.

See this fx guide thread

Not publicly available but already used by animation studios, so you sould contact Crytek for more info.

In Topic: GDC videos?

31 March 2015 - 04:43 AM

all talks should be available on http://www.gdcvault.com/

yet you need a subscription (included in a GDC access pass) to view most of them.