Sunflow's exporter

[kwistenbiebel]

Hi all,
I am trying sunflow out on a test model.
This is the first output I get after pushing 'render' in the Sunflow GUI.

As you can see, there is direct light but the indirect light needs more bounces/trace depth.
I tried to find a way to change that but I couldn't find how.
Searching on Sunflow forum, I found code lines but I can't seem to be able to use the ctrlC+ctrlV (copy-paste) command to enter it in the' script editor' of the Sunflow editor.
What am I doing wrong.
Should I be editing the .sc file (it's HUGH !) or instead put code in the 'script' editor.
Where can I change the presets like resolution, GI settings, etc...?

I tried reading briefly through the Sunflow forum but couldn't find the answers.
Could someone give me a hand to get started with this?

Thanks in advance,
Kwistenbiebel

[ilay7k]

@kwistenbiebel said:

Hi all,
Should I be editing the .sc file (it's HUGH !) or instead put code in the 'script' editor.
Where can I change the presets like resolution, GI settings, etc...?

I tried reading briefly through the Sunflow forum but couldn't find the answers.
Could someone give me a hand to get started with this?
Thanks in advance,
Kwistenbiebel

Kwistenbiebel look at cornell_box_jensen.sc or julia.sc from examples
you can download from off.site of sunflow render.

but need add some modification to lights or mats
-------julia.sc

gi { type path samples 16 } 

light {
  type spherical
  color { "sRGB nonlinear" 1 1 .6 }
radiance 60  <----------for gi
  center -5 7 5
  radius 2
  samples 8
} 

---

from cornell_box_jensen.sc

trace-depths {
  diff 4
  refl 3
  refr 2
}

photons {
  caustics 1000000 kd 100 0.5
}

% uncomment this block and comment the following GI block to switch gi engines
............
...........
%% use these to view the effect of the individual gi components
% override debug_caustics false
% override debug_globals false
% override debug_gi false

and mat-s had

shader {
  name debug_caustics
  type view-caustics
}

shader {
  name debug_globals
  type view-global
}

shader {
  name debug_gi
  type view-irradiance
}

---

[kwistenbiebel]

Thanks Ilay,

I tried to copy and paste some of those code lines but it produces errors when opening in sunflow.
Not sure if those lines would just need to be added or they need to replace existing lines.
My lack of experience in using code lines makes this somewhat too hard .

This is the result from a 'default' SU2Sunflow export.(render time ca. 4 minutes 1600X1200 )

I can see Sunflow has potential when looking at the gallery section.
Hoping to see a full blown Sketchup plugin soon.

Regards,
Kwistenbiebel

[ilay7k]

Hello Kwistenbiebel!
I have same errors.
Nice w.i.p.-render, sunflow has instacing-structure like 3dsmax's proxy and i like it.
Indigo is alternave to Maxwell render/fryrender
I think sunflow - vray-killer )))...too
PS
I am from vray4skp-forum too.

[ilay7k]

Didier i read(fro s~r's forum) about new version of su2sf.
Can you share it?

[Didier Bur]

Yes, it will be uploaded here tomorrow (now upload facility on the SF forum ).
Don't expect too much with this one because it is in its early stage of development

[ilay7k]

Hello Didier! It's great news.
In any case, thank you!
ilay

[Didier Bur]

The update is here:
http://www.sketchucation.com/forums/scf/viewtopic.php?f=153&t=1514
Also available at my site, "Files-Converters-Misc" section.
Regards,

[ilay7k]

Thanks a'lot!!!
But some errors are appeared...

Error; #<TypeError; cannot convert Fixnum into String>
su2sf.rb;81;in `+'
su2sf.rb;81;in `output_image_settings'
su2sf.rb;728;in `export'
su2sf.rb;793
su2sf.rb;793;in `call'

when i change render-settings(Antialiasing).

[Didier Bur]

Fixed (uploaded at the same place) . Sorry for the inconvenience and thanks for reporting,

[ilay7k]

Didier, thanks for fix!
So i try it.
sunflow render works fine with outdoor models.
But indoor...error appears about sky-light(about photon-emiting)

[Didier Bur]

Path tracing need emitting light to shoot photons (afaik). So when you select "solid color" as background there's no sunsky, thus no light to emit. Same occurs outdoor too.

[ilay7k]

Thank you!
I understand it(outdoor scences are only tests)
I trying to render indoor scences like - http://rapidshare.com/files/45915944/sb1_sf.rar.html
I also try to "play" with different settings of gi-types
For example, i use "standard" ui-setting:

1. render-sett.: res.- 800x600; gi - high; aa- none
2. background sett.: bg type - sky
   and when i render and start-up message about "photon mapping enabled, but no globals photons to emit". it's for light-object
   Ilay

P.S. maybe some technical questions are asked on official forum?

[Didier Bur]

I suppose that when one is indoor and the sunsky is not visible (no openings to the outside) and when there is no light inside the room, SF considers that there are no photons to emit ?
I'm not familiar enough yet with SF to be sure of that. Maybe you could ask Eugene or fpsunflower at the official forum.
Cheers,

[ilay7k]

Ok! I ask.
I try to illuminate by one light - "sky+sun" - sky-object(for daylighting)

Ohhh, Didier! What are you think about simulated(artificial) lighting?
maybe it' like materials, only to group = sf-"light.name_group".

Sorry for my bad English, my russian is native.

[Didier Bur]

Artificial lighting will be supported in next release (point light, spot, and so on).

[ilay7k]

I test AO-settings

[Didier Bur]

Hi all,
When coding the SketchUp2SF plugin, I started to experiment shaders.
These first experiments can be downloaded as a library here:
http://www.crai.archi.fr/RubyLibraryDepot/Ruby/Sunflow/thumb.html

Or go to my site and click on the Sunflow Shaders menu.
Enjoy,

[ilay7k]

Didier, it's great! Thank you
Do you work at material editor or something?

[Didier Bur]

No,
I'm just trying to get good parameters mainly for diffuse and glass shaders to implement the SU materials convertion in the plugin.
Cheers,

P.S.: Be back 08.25 (holidays )