I did some integration work in nuke back then, created a plugin to
compute the harmonic coefficients just to finally find out that there
was something "wrong" with Roys gizmos. They took one additional
coefficient in account, but I could not find out what this magical
number was and how it was computed so after some fiddling I gave up.
On 05/30/2012 10:57 AM, Ron Ganbar wrote:
Hi Paolo,
naturally I can do it in Atomkraft, but I'm thinking regular Nuke for now.
Tahl,
good idea about the Environment light, but I was thinking what Roy did
in that same masterclass with the whole spherical harmonics thing.
Anybody ever had a look at that and collected it all to a usable gizmo?
Thanks,
Ron Ganbar
email: [email protected] <mailto:[email protected]>
tel: +44 (0)7968 007 309 [UK]
+972 (0)54 255 9765 [Israel]
url: http://ronganbar.wordpress.com/
On 30 May 2012 09:51, Paolo Berto <[email protected]
<mailto:[email protected]>> wrote:
Hey Ron,
you can easily do it with AtomKraft, even with the free version
you can use SH and it is pretty fast :)
- Lay down an AtomEnvironment
- Plug in your HDRI (if not latlong you can use SphericalTransform)
- Set mode to "Accurate" for SH (spherical harmonics). Just FYI
the "Approximate" stands for bent normals.
If you also need real shadowing from the environment you can:
- turn AENV shadows from "off" to "simple" to also have proper
shadow from the HDRI environment (when using shadows you should
use a proper sample count)
If you instead just need plain environment occlusion :
- connect another AENV with no texture plugged (default is white
environment) and
- set shadows to simple, and samples accordingly.
Note that:
* The relative AOVs are properly filled.
* There are many other combinations (plain environment
reflections, raytraced reflection of the environment according to
the BRDF, multiple textures for diffuse & specular...) that you
can achieve, we are planning a simplification of AENV along with
presets as it is a bit overcomplicated for a comp artist.
Beers,
P.
On Wed, May 30, 2012 at 2:04 PM, Ron Ganbar <[email protected]
<mailto:[email protected]>> wrote:
Hi Guys,
does anyone do HDRI based Lighting in Nuke? How can one do
that, I wonder?
I remember something from the 2009 Foundry Masterclass, but it
wasn't straight forward by any stretch of the imagination...
Thanks,
Ron Ganbar
email: [email protected] <mailto:[email protected]>
tel: +44 (0)7968 007 309 <tel:%2B44%20%280%297968%20007%20309>
[UK]
+972 (0)54 255 9765 <tel:%2B972%20%280%2954%20255%209765> [Israel]
url: http://ronganbar.wordpress.com/
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