"Usenet User" <no.spam@no.way> wrote in message
news:8u5es39qda867umi3dp5h1ujr1ocv9uqdh@4ax.com...
> Problem: create a 256-px-wide grayscale picture, filled with a linear
> gradient from 0 to 255
>
> Settings for the gradient tool:
>
> Foreground to background
> Linear gradient
> Mode: normal
> Opacity: 100%
> Reverse: no
> Dither: no
> Transparency: no
>
> To my surprise, the resulting gradient is not linear. It seems like it
> is a bit squished toward the center, i.e., the edge color are a bit
> stretched.
>
> Any ideas?

Click on the gradient in the gradient tool settings at the top of the
screen, and set the Smoothness slider to zero.

Gradient smoothness has been with us since at least Photoshop 5.5. Even
today, many discussions of this feature assume that the term smoothness
means an even distribution of gradient values. The term actually means the
opposite: the use of a spline function to weight the ends of the gradient so
that color transitions within the gradient are smoother. At the time this
feature was introduced, this was considered to be so superior to a linear
gradient that there was no way to disable it! Photoshop 6.0 provided a way
to control smoothness in the gradient editor.
---
Mike Russell - www.curvemeister.com

Problem: create a 256-px-wide grayscale picture, filled with a linear
gradient from 0 to 255

Settings for the gradient tool:

Foreground to background
Linear gradient
Mode: normal
Opacity: 100%
Reverse: no
Dither: no
Transparency: no

To my surprise, the resulting gradient is not linear. It seems like it
is a bit squished toward the center, i.e., the edge color are a bit
stretched.

Any ideas?

On Feb 28, 2:29 pm, Usenet User <no.s...@no.way> wrote:
> Problem: create a 256-px-wide grayscale picture, filled with a linear
> gradient from 0 to 255
>
> Settings for the gradient tool:
>
> Foreground to background
> Linear gradient
> Mode: normal
> Opacity: 100%
> Reverse: no
> Dither: no
> Transparency: no
>
> To my surprise, the resulting gradient is not linear. It seems like it
> is a bit squished toward the center, i.e., the edge color are a bit
> stretched.
>
> Any ideas?

I do not know why you would not get a linear gradient with those
settings. I do not have CS3 for testing but I tried it with CS2 and it
worked fine.
Unless the blend modes have changed from cs2 to cs3 then you can
verify the linearity by duplicating the gradient and rotating it 90
degrees and placing it in linear light blend mode at 50% opacity then
add a threshold adjustment layer set to 128 - the line will be strait
from corner to corner, if it is linear.

On Thu, 28 Feb 2008 17:05:04 +0800, "Mike Russell"
<RE-MOVEmike@Curvemeister.comRE-MOVE> wrote:

>"Usenet User" <no.spam@no.way> wrote in message
>news:8u5es39qda867umi3dp5h1ujr1ocv9uqdh@4ax.com.. .
>> Problem: create a 256-px-wide grayscale picture, filled with a linear
>> gradient from 0 to 255
>>
>> Settings for the gradient tool:
>>
>> Foreground to background
>> Linear gradient
>> Mode: normal
>> Opacity: 100%
>> Reverse: no
>> Dither: no
>> Transparency: no
>>
>> To my surprise, the resulting gradient is not linear. It seems like it
>> is a bit squished toward the center, i.e., the edge color are a bit
>> stretched.
>>
>> Any ideas?
>
>Click on the gradient in the gradient tool settings at the top of the
>screen, and set the Smoothness slider to zero.
>
>Gradient smoothness has been with us since at least Photoshop 5.5. Even
>today, many discussions of this feature assume that the term smoothness
>means an even distribution of gradient values. The term actually means the
>opposite: the use of a spline function to weight the ends of the gradient so
>that color transitions within the gradient are smoother. At the time this
>feature was introduced, this was considered to be so superior to a linear
>gradient that there was no way to disable it! Photoshop 6.0 provided a way
>to control smoothness in the gradient editor.
>---
>Mike Russell - www.curvemeister.com
>
That was it, thank you!