False Color In ARV

[Anonymous]

Hi

I know it's off topic, but is it possible to integrate False Color into ARV?

Thanks

[lee_griggs]

The Utility shader has an Edge Mode and a Number of Lights mode which render as a 'heatmap' that may of be some use.

[Anonymous]

Thanks for your answer,

so the 0 IRE in false color correspond to the Black color in heatmap and 100 IRE correspond to the red Color?

The Question is how do I know where the area are clipped to black or clipped to white

like in this image bellow

[lee_griggs]

You can get a heatmap too now using kick.

https://arnoldsupport.com/2017/11/15/kicking-a-cputime-heat-map/

[Anonymous]

That's really nice

I accidentally discover the other key like:

a: move to the right
s: zoom out
d:move to the left
h: center
w:zoom in
i:shaded mode
Shift+I:return to normal mode
Shift+R=Red channel
Shift+G=Green channel
Shift+B=Blue Channel
Shift+C=Color Channel
[: decrease exposure
]:increase exposure

maybe there are others hotkey

[lee_griggs]

You can also fake it using a Facing Ratio shader.

[lee_griggs]

There is also the Heatmap filter.

[Anonymous]

@Lee Griggs

Still need to know what is the corresponding heatmap Color in False Color IRI, In False Color RED mean overexposed light witch is not the case with heat map. Arnold heatmap is used for masking not for calculating saturated light

[Anonymous]

@Lee Griggs
maybe we are not talking about the same thing, please take a look here:

http://www.thehurlblog.com/using-false-color-on-a-flanders-scientific-monitor-cinematography-online/

[lee_griggs]

There is a False Colour here.

[Anonymous]

Thanks Lee, but Maya has already an OCIO for most Camera.
False Color is a plugin for most compositing package.

Most modern camera and monitor ship with FalseColor ( they practically replace the waveform )
FalseColor let you see exactly where the light is, and where is missing. In real life we use a light meter to calculate exposure for all lights ( key, rim, back and all the rest) and all of that is based on eye, of course we can use waveform in post to see and judge if the exposure is right or not, based on IRE (black level, mid gray and highlight )
when doing render, and look at the image in ARV, how do we know that particular light is overexposed? or underexposed? The only tool we have to judge is our eyes! but the eyes are different, like fingerprint, we never see the same color, and we can't trust our eyes in such situation!
So we need a tool in ARV, click FalseColor ( if the team can implement it, I hope so..) to show the distribution of light, that way we can see where the light need to be adjusted.
Here is the link for False Color: https://timeinpixels.com/

[Anonymous]

FalseColor integrated in Vray... why not in Arnold?

link to video: 34:04
https://www.youtube.com/watch?v=LHvY0lcI-Ns