Tone scale slope behavior at min and max luminance

[Thomas_Mansencal]

Hi Daniele,

I’m totally inline with every single of your points, I have been there, however the reality is different and we live in a far from perfect world.

@daniele

Would it not be better to engage with the logo designer and go through the process of creating a real scene referred logo that transforms correctly in all viewing condition?

You might not be able to alter a logo at all, some clients just don’t give a damn about technicalities, they just know what they want, e.g. 7 lines all strictly perpendicular together. It is common for people working in commercials and there is a related thread about preserving the look of sRGB graphics here.

@daniele

Wouldn’t it be better to have a scene referred image that “almost” look like the original but can be graded, added light etc…?

We might get that in an hypothtical future and lot of people have discussed about it with Apple but as of ARKit (and ARCore) current state you just receive a YCbCr image and have to deal with it. Compositing the feed directly behind the already tonemapped game content is an effective workaround but there are many use cases where you want to directly sample the video feed and use it as a texture, thus you are back to square one.

@daniele

This is really “bad practice” in my eyes.

Same here but people have done it and will continue to do so.

@daniele

You will undermine the biggest goal of ACES which is the long-term archive.

I don’t advocate it and I think the opposite: it would allow non ACES shows to use ACES as a container and thus have access to ACES archival by just shipping a single LMT.

@daniele

I hope some of this makes sense.

It does make sense and again I’m inline with it

Cheers,

Thomas