Am 23.06.2015 um 09:28 schrieb Thomas de Groot:
> On 22-6-2015 18:07, clipka wrote:
>> POV-Ray has been heavily geared towards PBR in recent times, and UberPOV
>> should by now be a viable PBR tool, provided you stick to the following
>> rules:
>
> Now, that is a comprehensive tutorial about do's and dont's. Thanks
> indeed Christoph.

Forgot two things:

- Always use "fresnel on" for the entire finish block (you'll need a 
POV-Ray 3.7.1-alpha build for this, or UberPOV; don't forget to specify 
"ior"), even if you're not using "specular", unless you are using 
subsurface scattering.

- When using "brilliance", always use "brilliance FLOAT, FLOAT" with 
both parameters set to the same value, and specify "brilliance on" in 
the radiosity block. (You'll need a POV-Ray 3.7.1-alpha build for these, 
or UberPOV.)


Also, my mind played a trick on me regarding the use of "fresnel on" in 
the entire finish block: While I thought I had implemented it in 
UberPOV, I actually put it right into official POV-Ray; thus, a 
sufficiently up-to-date POV-Ray build (3.7.1-alpha.*) will do just as 
well for this.


> No more sad examples of reflective spheres on chequered planes :-)

It's impressive what a difference it can make to really press for PBR, 
even for something so seemingly trivial as RSoCP; I think especially 
using a fully fresnel-aware model (using "fresnel on" in the entire 
finish block) and blurred reflections (with specular highlights properly 
tuned to match) really adds a level of credibility that you might not 
even have expected to be there.

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