Layer Styles --> Inner Glow and a gradient map adjustemnt on top of it Might require a duplicate and using the originalk shape as a mask only. For anything more complex, blends and gradient meshes in Illustrator are probably your friend...
thank you for the answer. But unforunately I'm a newby. Could you go into more details please ?
The problem I always got with the gradient tool is the following
The gradient starts at a certain point and uses a hard coded distance (e.g. 50 pixels from this point to this direction like a vector)
This makes it impossible to change the geometry with the full gradient
For example :Filling this rectangle with a gradient and I’m defining a vector mask to it
Afterwards I changed the vector mask to this
The gradient is cut instead of changing, compressing it.
Is there no way to define a starting point (edge, path), a direction and a target edge, path ?
Because then, after changing one of the edges, the gradient has to be recalculated.
I would use a Stroke layer style, Position set to Inside, using Fill Type: Gradient rather than color, and the Gradient's style set to shape burst, rather than linear. Then, increase the size until you get the desired effect.
You are then able to modify the shape to your best convenience.
thx for tipp, but if I understand u right than u mean like this
As you can see this will not have the necessary effect I got two gradients and in addition to that
by changing the size I will lost some colors. Unlikely I need to have a defined range of gray values of 100 to 128 in the gradient
Sorry, I thought you meant from the outside to the centre of the shape.
What about doing like Mylenium suggested, and making the shape biger, but using a mask to get the "original shape"?
but how can I configure a mask which allows me to get the hole gradient in the smaller areas ??
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Mark, if you want to try that route, you would basically need to double the surface/"bandwidth" of the arch, by moving down the inside-center points, then use a layer mask, and checking "layer mask hides effects" in the advanced blending options. But it is convoluted, compared to the simplicity of a blend in Illustrator, as it has been... illustrated by Semaphoric.
First many thx to all.
I figured out all proposed options. I prefer the option from c.pfaffenbichler.
Additional questions where popping up during the tests.
I would be very interested to see how you figured out the circles with the blend option to fit the geometry
Could you please tell me how I get the color gradient into the width option ?
Special thanks to you for the explanation in details
the gradient mesh looks very nice and precise the only problem with that is to bring the mesh on my geometry....I tried out different ways to generate the mesh…
even with the hints to only select the 4 points of the geometry (which define the end points of the geometry and select them with the white arrow).
But the mesh will not generated in a proper style....May (or sure) I did something wrong with it
Mark, I don't think you need circles, just get the top and bottom shapes from the one in Photoshop, if you set enough intermediate steps, you'll get a smooth gradient.