PDF Axial shading Pattern ranging from opacity

Hello

I am trying to find a way to have as PDF (say 1.4) an axial model shading but such that the opacity of the color extends along shading, not just the colors themselves.

Of course, this is supported in rendering systems, such as GDI +, where the alpha channel is in color. But in PDF format, the opacity is controlled separatedly, so in the case of a backstory, I have no idea where to specify that.

Please note that my question is about PDF itself (as in the spec), regardless of any library/PDF generation software.

TIA

I would use a SMask in the ExtGState which is in progress at the time of make the shading.

Tags: Adobe Developers

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