balance your lights as a postprocess without rerendering

[BZ Win]

You can change the bit/channel in PS.

[psor]

If you change the bitdepth then you'll lose all important informations of the
EXR file and the blending won't be correct.


take care
psor

[zuegs]

Yes, Photoshop is someway limited to 16bit for the work with EXR but still give a good result
A console program would be coool to blend EXR files:

c:\>EXRblend out.exr 0.2 in1.exr 0.5 in2.exr 0.3 in3.exr

is here a genius c++ coder that could have a look at this


@Nick,

Could indigo export separate EXR-files for each light-group (defined in XML)? That would be realy COOOOL :

Code: Select all

<meshlight>
  <light_group>2</light_group>
  ...
  ...
</meshlight>

[zsouthboy]

I like that light groups idea.


Keep in mind, that just off the top of my head, we're now dealing with n + 1 *framebuffers* where n is # of light groups, instead of just 1, so that will increase memory consumption. Efficiency losses from blending those n in memory to create the preview image will happen, too. Disk activity goes up.
Network rendering clogs your network more.

[Big Fan]

edited to remove all

[BZ Win]

You can do this in photoshop with two normal pngs.

Just set the layer with the lights you want to set to the blend mode "lighten"

and, you get this:





Tada!

[Big Fan]

edited to remove all

[BZ Win]

Another example, again, 2 pngs.

[Big Fan]

edited to remove all

[BZ Win]

I was making the point that it CAN be done in photoshop, and with pngs if you want to....

[zuegs]

@Bz Win,
very nice renders , you are right, you can do the same with the PNGs with 2 disadvantages :
- PNG is only 8bit, depending of gain you're apply you lose resolution
- As PNGs are gamma corrected, adding two PNGs isn't physicaly correct, i think

@zsouthboy,
yes memory usage and network traffic could be a problem ... user should have the option to tell indigo if it should render all at same time or sequentily do you know how maxwell solve memory problem for there "light balance feature"?

@Big Fan: Yes blending exrs we will be able to do, we still need some simplifications on exporters (handling light-groups) and a "render queue" that automaticly renders the XMLs....

[u3dreal]

Yes, Photoshop is someway limited to 16bit for the work with EXR but still give a good result
A console program would be coool to blend EXR files:

c:\>EXRblend out.exr 0.2 in1.exr 0.5 in2.exr 0.3 in3.exr

is here a genius c++ coder that could have a look at this


@Nick,

Could indigo export separate EXR-files for each light-group (defined in XML)? That would be realy COOOOL :

Code: Select all

<meshlight>
  <light_group>2</light_group>
  ...
  ...
</meshlight>

This would be absulutely awesome....sorry but i think i missed the whoel discussion... something is wrong with the new forum i miss so many cuase it is not shown..

cheers

u3dreal

[zuegs]

Would someone try my yellow software:

http://www.hostfiles.org/download.php?id=B645756B
(on your own risk and without warranty)

Please unzip all DLLs and EXE to a directory. Then just try start Yellow.
If it comes up you can load EXR files with "Add" button. Scrolling view with left mouse button, zooming with right mouse button... and remember it's not finished and still buggy

[u3dreal]

Hey cool zuegs... maybe there is an idea to add this to my exporter..
with hold time this could be possible...i'll give it a try ..

cheers to switzerland..

u3dreal

[BZ Win]

Im starting up a render now... and downloading