POV-Ray : Newsgroups : povray.beta-test : Experimental features branch Server Time: 25 Apr 2019 21:43:44 GMT
  Experimental features branch (Message 1 to 3 of 3)  
From: clipka
Subject: Experimental features branch
Date: 20 Jan 2019 17:32:06
Message: <5c44b096$1@news.povray.org>
Updated the Lommel-Seeliger / Oren-Nayar branch with all the latest 
v3.8.0-alpha features, and released it under a new designation:

https://github.com/POV-Ray/povray/releases/tag/v3.8.0-x.10021928


The `v3.8.0-x.NUMBER` designation is not intended to specifically denote 
this pair of features, but rather a particular collection of additional 
features quite likely to undergo further compatibility-breaking changes 
before integration into the official development branch, but at the same 
time highly unlikely to be ditched again. Lommel-Seeliger and Oren-Nayar 
just happen to be the first such features to be in this branch.


For example, with the Oren-Nayar diffuse model I am not sure yet whether 
the parameter should specify the /standard deviation/ (sigma) or the 
/variance/ (sigma squared) of the microfacets orientation. A comparison 
with the parameterization used by other renderers (Blender maybe?) could 
be of use there.

Also, the interaction between both new models and the `fresnel` feature 
may still be subject to change; the current behaviour is simply emergent 
from the simplest implementation, and may not be the most useful.


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From: Mike Horvath
Subject: Re: Experimental features branch
Date: 4 Mar 2019 00:08:07
Message: <5c7c6c67$1@news.povray.org>
For all these experimental branches, is there a way to read the change 
logs without downloading the executables?


Mike


On 1/20/2019 12:32 PM, clipka wrote:
> Updated the Lommel-Seeliger / Oren-Nayar branch with all the latest 
> v3.8.0-alpha features, and released it under a new designation:
> 
> https://github.com/POV-Ray/povray/releases/tag/v3.8.0-x.10021928
> 
> 
> The `v3.8.0-x.NUMBER` designation is not intended to specifically denote 
> this pair of features, but rather a particular collection of additional 
> features quite likely to undergo further compatibility-breaking changes 
> before integration into the official development branch, but at the same 
> time highly unlikely to be ditched again. Lommel-Seeliger and Oren-Nayar 
> just happen to be the first such features to be in this branch.
> 
> 
> For example, with the Oren-Nayar diffuse model I am not sure yet whether 
> the parameter should specify the /standard deviation/ (sigma) or the 
> /variance/ (sigma squared) of the microfacets orientation. A comparison 
> with the parameterization used by other renderers (Blender maybe?) could 
> be of use there.
> 
> Also, the interaction between both new models and the `fresnel` feature 
> may still be subject to change; the current behaviour is simply emergent 
> from the simplest implementation, and may not be the most useful.


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From: clipka
Subject: Re: Experimental features branch
Date: 7 Mar 2019 15:20:05
Message: <5c8136a5$1@news.povray.org>
Am 04.03.2019 um 01:08 schrieb Mike Horvath:
> For all these experimental branches, is there a way to read the change 
> logs without downloading the executables?

Go to https://github.com/POV-Ray/povray, select "Branch: <whatever>" 
(e.g. "autobild/experimental"), then click on "changes.txt"...

... and then make wild guesses which parts of the file are different 
from the main branch. If the file in the branch is up-to-date at all. Sorry.


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