CS3 “blend using 1.0 gamma” doesn’t work for blurs and motion blur?

[Darby Edelen]

[Peter O’Connell] “When I choose “blend colors using 1.0 gamma” in the projet settings” It works fine for crossfades and such, but not for blurring individual layers or motion blurring them.”

You could try downloading a linear color profile. There are some available for free online, see if you get better results with those. Are the blurs not looking correct when you render or just when you preview?

[Peter O’connell]

Hi wuzelwazel, the linear profiles don’t seem to work better in that regard. Here is a screen shot to show what I am going for.

https://www.peteoconnell.com/7362/stillLife.jpg

The middle image is the one I am trying to get (which I created with an HDR image by bracketing my blur with the exposure effect set to a 1/2.5 gamma and then the exposure effect again as an adjustment layer with a 2.5 gamma to negate the original gamma. This seems to mimic the gamma 1.0 blending almost perfectly for crossfades and other instances when 2 layer interact, but don’t seem to work for invividual layers whose pixels are being filtered through an effect (eg. blur)

Pete O’Connell

http://www.barxseven.com

[Darby Edelen]

So your concern is that linear blending is working correctly in AE when you’re blending different layers (opacity/motion blur) but not when you use something like a directional blur on a single layer?

Was your source image created in a linear color space? Are you converting it to linear?

Check this out for more information on working in linear:

https://prolost.blogspot.com/2006/02/by-way.html

https://prolost.blogspot.com/2006/02/linear-color-workflow-in-ae7-part-1.html

https://prolost.blogspot.com/search/label/Adobe%20After%20Effects?updated-max=2006-03-16T00%3A46%3A00-08%3A00&max-results=20

The discussions of linear compositing start about a quarter of the way down that last page and continue to about half way down.

[Peter O’connell]

Hi, thanks for the links. Stu Maschwitz’s linear workflow works well in AE 7 but I was trying to workout a simpler way to reach the same result. In CS3 the ‘more options’ dialog for cineons in interpret footage is grayed out for some reason, so I can’t get it to work there anyway.
The middle image of my previous post sort of mimics his linear work flow, I just use a couple instances of the exposure effect instead.
Thanks
Pete O’Connell

http://www.barxseven.com

[Adolfo Rozenfeld]

I’m far from a color management/linear float expert, but you don’t have to download linear profiles.
AE CS3’s all-new color management worfklow now includes an option in project settings called “Linearize Working Space”. So, you can pick any of the wide RGB color spaces as working space and check this option. Note that when you enable it, “Blend using 1.0 gamma” is also activated (it comes bundled in the same deal, you could say). The Linearize Working Space option extends linear compositing so that it not only applies to inter-layer compositing, but also to intra-layer blending (internal blending modes in shape layers’ fill and stroke attributes, intercharacter blending in text layers, etc.).

Note also that 32 bpc processing is a great idea, but not really a requirement for Blend 1.0/Linearize Working Space.

Adolfo Rozenfeld
Buenos Aires – Argentina
ar(AT)adolforozenfeld.com

[Darby Edelen]

[Adolfo Rozenfeld] “but you don’t have to download linear profiles.”

No, you don’t. But you can use a linear profile as your project working space and you won’t have to enable linear blending.

[Adolfo Rozenfeld]

Sure, I just wanted to note the feature is there. Choices are good, and there are as many workflows as there are people 🙂

Adolfo Rozenfeld
Buenos Aires – Argentina
ar(AT)adolforozenfeld.com

[Darby Edelen]

[Adolfo Rozenfeld] “Choices are good, and there are as many workflows as there are people”

This is definitely true =) Plus I haven’t had much of a chance to play with CS3 (too busy working) so I actually did learn some new bits of information from your post! That’ll teach me for responding so quickly… =)

[Peter O’connell]

Hola Adolfo, I think my problem stems from the fact that the cineon ‘more options’ dialog is grayed out in CS3 (in AE 7 it works fine). So I can’t linearize the cineons as I would like to in CS3. Here is a cineon if anyone wants to try.

https://www.kodak.com/US/en/motion/support/digitallad.jhtml?id=0.1.4.15.8.8&lc=en

If anyone knows of a workaround, please let me know.
Thanks Pete

[Adolfo Rozenfeld]

Peter: The Cineon settings are now located in the Color Management tab of Interpret Footage.

Adolfo Rozenfeld
Buenos Aires – Argentina
ar(AT)adolforozenfeld.com