On 23/02/2018 13:22, William F Pokorny wrote:
> On 02/23/2018 03:04 AM, Stephen wrote:
>> On 22/02/2018 21:58, Alain wrote:
>>> Le 18-02-22 à 07:45, Stephen a écrit :
>>
>> Thanks. I have a troublesome mesh that is taking ages to render and I 
>> am looking for reasons.
>> What would a Smpls/Pxl = 0.04 signify?
>>
> 
> I sometimes look at Max Level results, but little else in that section 
> of output...
> 

Me to. I've never really understood the significance of them.


> My understanding is Smpls/Pxl is usually 0.0 if anti-aliasing is off. If 
> AA is on it goes up, but can still be quite small for the overall image 
> - if not much super-sampling was needed for the image in total.
> 

In that case this scene is not doing much super-sampling.

> Are you asking about those particular outputs because you see a 
> significant difference in those particular results between the two 
> methods? If so, what are the values returned?
> 

Minuscule. 0.0 Vs 0.04


> When you say 'mesh' do you mean just a single mesh as rendered to some 
> plain color via both tools? Or are you talking about a complete scene 
> via Blender vs PoseRay with textures and 'everything'?
> 

Almost the latter. It is one Poser hair mesh. The type that uses 
transparency maps.
It renders in seconds via PoseRay but when the obj file is imported to 
blender. The Pov script took 17 hours and there were still 3 blocks 
unfinished.

BTW Thanks for thinking about this.

> If the former I'd look at the mesh file size as a first clue. Perhaps 
> too if a really simple scene whether bounding is on in both and what 
> those stats are. Should somewhere see the output :
> 
> Bounding boxes.......On
> ...
> Bounding Box  <tests> <succeeded> <percentage>
> 
> 

Yes Bonding boxed were on:
Ray->Shape Intersection Tests      Succeeded        Percentage
Mesh            10030736            4135877           41. 23
Bounding Box    252706844           86379467          34. 18


> If working with complete scenes from both tools, the render time 
> difference could be a great many things. Suppose I'd start by looking at 
> both sets of files looking for differences. 

I've started doing that. The files are large and I've had to butcher the 
Mesh in Blender to get it to a state where I can see what is inside it.
I really need to get some better tools


Are there ini files where
> one might have some expensive option on by default and the other not for 
> example?
> 

I can't see much here:

Version=3.7
All_File=1
Input_File_Name='F:\Graphics\Poser\Blender 
tests\BugReport\Cutdown\Cutdown01a3a1.pov'
Output_File_Name='F:\Graphics\Poser\Blender 
tests\BugReport\Cutdown\Cutdown01a3a1.png'
Width=960
Height=540
Bounding_Method=2
Display=1
Pause_When_Done=0
Output_File_Type=N
Output_Alpha=1
Antialias=on
Antialias_Depth=3
Antialias_Threshold=0.3
Sampling_Method=2
Antialias_Gamma=2.5
Jitter=off


There are two methods I know of to import an Obj file into Blender.
The first is to use the standard import module which is what I have been 
using. I don't have 100% confidence in it since I found a couple of 
small bugs in the material importing side.
The other is to convert it to a Mesh2 with PoseRay and import it using 
the PovRay importer. Unfortunately that is buggy to although I have put 
in a bug report for that one.
I just wanted a clue from the stats to what was happening.


-- 

Regards
     Stephen

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