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buddhi1980 / mandelbulber2

Official repository for Mandelbulber v2
GNU General Public License v3.0
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Add some HDR examples for showcase of EXR format #542

Open ghost opened 6 years ago

ghost commented 6 years ago

@buddhi1980 @zebastian @mclarekin

Greetings,

Can someone please explain in simple terms what are the benefits of using EXR? Does anyone have any good settings files and renders to add to the repo?

Thanks, coast

buddhi1980 commented 6 years ago

With EXR format you can export z-buffer with floating point half precision accuracy. This is the only format which supports 32bits per color channel. It is also very useful when are composed HDR scenes. This format is supported by programs like Blender.

ghost commented 6 years ago

Ok sounds intriguing. Do you have any sample renders or fract files to really demonstrate the potential of mandelbulber when used with exr?

buddhi1980 commented 6 years ago

This is an example of HDR image which could be used as a texture for any professional 3D program https://hdrmaps.com/riverside-office-buildings Click preview and use blue scroll on the top to see how wide dynamic range this image has.

If in Mandelbulber you will use very bright light sources and on the same image you will have areas of shadow then you will also get very high dynamic range which cannot be covered by standard image formats.

Using of HDR texture is very important in professional graphics because allows to get very realistic light reflection and global illumination.

In commit https://github.com/buddhi1980/mandelbulber2/commit/305fd6c40b9ad40df0ff0dfb8a5fd779fcb0ab0c I have added example which generated HDR image whcih could be saved in EXR format.

EXR images can be loaded in Gimp 2.0

ghost commented 6 years ago

Thanks Krzysztof! I will check it out.

On Sun, Sep 23, 2018 at 11:31 AM Krzysztof Marczak notifications@github.com wrote:

This is an example of HDR image which could be used as a texture for any professional 3D program https://hdrmaps.com/riverside-office-buildings Click preview and use blue scroll on the top to see how wide dynamic range this image has.

If in Mandelbulber you will use very bright light sources and on the same image you will have areas of shadow then you will also get very high dynamic range which cannot be covered by standard image formats.

Using of HDR texture is very important in professional graphics because allows to get very realistic light reflection and global illumination.

In commit 305fd6c I have added example which generated HDR image whcih could be saved in EXR format.

EXR images can be loaded in Gimp 2.0

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