WIP - Playing with HDR

Philemo_CarraraPhilemo_Carrara Posts: 923
edited February 2014 in Carrara Discussion

Hi to all

I've decided to go into plugin development. I've got several wips and I wanted to share one of them.

It's a plugin adding HDR export capability to Carrara.

Here an example based upon a simple scene (DT yosemite HDR + Gazebo from DAZ).

First the PNG straigth from Carrara with and without gamma correction 1.8

Then the picture straight from picturenaut without tonemapping with gamma 1.8

gaz2notm.png
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gaz2.png
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gaz1.png
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Post edited by Philemo_Carrara on

Comments

  • Philemo_CarraraPhilemo_Carrara Posts: 923
    edited February 2014

    Now, some tonemapped images with picturenaut. All of them have a gamma correction of 1.8 for comparison

    gaz2tmi.png
    640 x 480 - 471K
    gaz2tme.png
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    gaz2tmf.png
    640 x 480 - 446K
    gaz2tmg.png
    640 x 480 - 498K
    gaz2tmh.png
    640 x 480 - 501K
    Post edited by Philemo_Carrara on
  • DartanbeckDartanbeck Posts: 13,976
    edited December 1969

    Cool.
    So, Picturenaut is the name of your plugin?

  • Philemo_CarraraPhilemo_Carrara Posts: 923
    edited February 2014

    Cool.
    So, Picturenaut is the name of your plugin?

    Hi Dart,
    Unfortunaly not :-)

    Picturenaut is a great FREE application from HDR Labs for manipulating HDR images.

    My purpose in citing it was to show the HDR output from an external POV.

    The plugin has no name yet. I guess HDR will do :-)
    I should add that my plan is to have tonemapping as a post render effect. One of the two next plugins in design.

    Post edited by Philemo_Carrara on
  • wetcircuitwetcircuit Posts: 0
    edited December 1969

    Philemo said:
    Cool.
    So, Picturenaut is the name of your plugin?

    Hi Dart,
    Unfortunaly not :-)

    Picturenaut is a great FREE application from HDR Labs for manipulating HDR images.

    My purpose in citing it was to show the HDR output from an external POV.

    The plugin has no name yet. I guess HDR will do :-)
    I should add that my plan is to have tonemapping as a post render effect. One of the two next plugins in design.

    Sounds cool! I always wanted HDR export for Carrara!

  • evilproducerevilproducer Posts: 8,910
    edited December 1969

    So does the plugin you are developing mean that you could create a scene without an HDRI in it, but rather the realistic sky, and then export that as an HDRI? Would it work to make your own spherical images and export to HDRI for use in other software as IBL?

  • Philemo_CarraraPhilemo_Carrara Posts: 923
    edited December 1969


    Sounds cool! I always wanted HDR export for Carrara!

    So was I. It's the reason why I've eventually decided to do it by myself.

  • Philemo_CarraraPhilemo_Carrara Posts: 923
    edited December 1969

    So does the plugin you are developing mean that you could create a scene without an HDRI in it, but rather the realistic sky, and then export that as an HDRI? Would it work to make your own spherical images and export to HDRI for use in other software as IBL?

    Yes, It's exactly that. I will post an example soon.
    That's one of the two reasons I wanted to do it. The other reason is that, while I think Carrara is a fine renderer, I strongly believe its weak point is the way it goes out of linear space. So, exporting an HDR file is a good way of extracting what is in linear space and use a better way of going out of it.

  • wetcircuitwetcircuit Posts: 0
    edited December 1969

    Philemo said:
    So does the plugin you are developing mean that you could create a scene without an HDRI in it, but rather the realistic sky, and then export that as an HDRI? Would it work to make your own spherical images and export to HDRI for use in other software as IBL?

    Yes, It's exactly that. I will post an example soon.
    That's one of the two reasons I wanted to do it. The other reason is that, while I think Carrara is a fine renderer, I strongly believe its weak point is the way it goes out of linear space. So, exporting an HDR file is a good way of extracting what is in linear space and use a better way of going out of it.

    :grrr: I once went into curvy space... it was painful! :ahhh:

    Consider me 1st in line for this plugin.... I was considering buying Terragen3 to get 360° enviro backgrounds, but I was balking at buying the full version just to get a spherecam.... Renewed interest in the possibility with a Unity3D plugin that allows IBL..., and also LuxRender...

    This is GREAT NEWS! Please keep us informed!

  • DartanbeckDartanbeck Posts: 13,976
    edited December 1969

    LOL

  • evilproducerevilproducer Posts: 8,910
    edited December 1969

    Talk about your curvy space! What would Rosy say?!? ;-P

  • Philemo_CarraraPhilemo_Carrara Posts: 923
    edited December 1969

    Philemo said:
    So does the plugin you are developing mean that you could create a scene without an HDRI in it, but rather the realistic sky, and then export that as an HDRI? Would it work to make your own spherical images and export to HDRI for use in other software as IBL?

    Yes, It's exactly that. I will post an example soon.
    .

    Done.
    I've generated an HDR environment which is available on Sharecg

    It's a 6000x3000 map. The camera is 2m (6ft) hi.
    You will need to add a distant light for shadows ans highlight. In the scene, the sun was almost noon.

    Here are some examples of render :
    I've used A3 and Stinger to show the lighting.

    view1.png
    640 x 480 - 405K
    View3.png
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    view4.png
    640 x 480 - 419K
    view5.png
    640 x 480 - 356K
    View6.png
    640 x 480 - 381K
  • wetcircuitwetcircuit Posts: 0
    edited December 1969

    Wooooo HOOOOO!

  • evilproducerevilproducer Posts: 8,910
    edited December 1969

    That looks like it could come in handy. I've used the spherical camera to make large images and used them for IBLs, but and HDR should look a bit more dynamic.

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