[bug] Blurrer does not respect superbright HDR Values

Hi Folks.

I rendered a spherical HDR image with some superbright lights. Here's a cropped version:

The waveform clearly shows the lightsource:

The image is 32Float, and when I blur it in Fusion, the result is as expected, with lots of blurring on the superbright areas:

With the Blurrer in Axy however the result looks more as if the image is clipped to Int:

If I'm doing something wrong please let me know. If not it would be great if superbrights wouldn't be clipped :-)

Cheers & all the best. 

Eric.


   EricWest

Comments

TwentyStudios
  -  

Have you set the render mode to linear?

EricWest
  -  

Yep. And to not auto-convert *.exr or *.hdr

In fact even switching between sRGB and Linear doesn't change the look of the blur...

Eifert@Aximmetry
  -  

Hi Eric,

The Blurrer module should work with HDR.

For further investigation, can you share the image with us in its original format?

Warmest regards,

EricWest
  -  

Hi Eifert. 

Thanks for chiming in.
I sent the EXR via Mail to support@

Cheerio.

Eric.


Eifert@Aximmetry
  -  

Hi Eric,

Thank you for sending the image, we found no issue with it.

 I am guessing you are rendering this image as the sky or environment map, like this:

If it is connected to a shader like in the above screenshot, you will have to set the rendering Camera to HDR Out:

Warmest regards,

Eifert@Aximmetry
  -  

Hi,

A small quick tip.
You can check the highest intensity in an image/video using the Measurer module. Like this:

Warmest regards,

EricWest
  -  

Hi Eifert. 

Thanks for the reply. My setup looks a little different though, since I'm converting the spherical map to a DDS Cube like so:

So the Blurrer is directly after the HDRI Image in,
Since blurring the cross after the Camera-Render_CUBE leads to unwanted artifacts.
The Renderer is set to HDR out, but measuring the output of the Blurrer looks quite different from what you see...

CheCheers.

Eric.


EricWest
  -  

PS:

It works as you described with rather low blur radius values.
Maybe it's a difference between how blur work in Fusion vs Axy, which I need to get used to :-)
But. yes, I stand corrected. With lower radius values the superbrights are still measurable.