Streaking occurs in Pdf?

[Anonymous]

Hey everyone out there.

I was hoping for any suggestions on a problem I have encountered. I have noticed on my drawings that have a hatch transparency (does not matter the percentage), that in CAD everything is fine, but as soon as I plot to pdf, the pdf image will have a lot of streaking in the transparency(there is no streaking in the preview window).

No matter the transparency or colour, the streaking remains very obvious. I was wondering if anyone has experienced this, or could provide some insight as to wether this is a CAD problem or a Adobe problem, or some functionality I am missing?

thanks very much for your time.

Regards - Brett

[neilyj666]

what pdf driver are you using? only way I've got around this is to plot to dwf first

[Alfred.NESWADBA]

Hi,

most common is not AutoCAD creating that, but the viewer, that are showing that.

If you use Adobe Reader then you can go to settings ==> page display ==> disable:

- 2D graphic acceleration

- smooth vector graphics

- enhance thin lines

Sorry not to know the exact wording as I'm using the german one.

HTH, - alfred -

[Buzz12345]

We've noticed this problem with the standard autocad pdf driver. The streaks tend to be along lines between vertices along the edge of the hatch.  I've attached a screenshot (a transparent hatch over an aerial photo) as an example.

The problem doesn't exist if we use a 3rd party pdf print driver to create the hatch (but that breaks the OSNAP and Layer control you get from the Autocad driver).

It'd be nice to get it fixed...

[Anonymous]

Hi alfred.neswadba
I have tried your suggestion but it actually makes it look worse.


When Plot-ing using Adobe PDF or CutePDF it works fine, no streaking.
When using the “Output > Export to PDF” tool the streaking happens.
I believe it uses the “DWG to PDF.pc3” to do the “export to PDF” as when I plot using the “DWG To PDF.pc3” the streaking accrues.
When I delete the DWG to PDF.pc3 and try to export to PDF it fails.
I remove all PDF printers and it can still export to PDF.

I believe it has nothing to do with any PDF printers, but I might be wrong. Any thoughts?

I’ve attached what my problem looks like.

Thanks
Regards – Rory (Brett’s IT guy)

[Alfred.NESWADBA]

Hi,

am I right that you have a image to plot (where these stripes occur)?

Is this an OLE-object or a IMAGE-reference?

>> When Plot-ing using Adobe PDF or CutePDF it works fine, no streaking.

If you have the option, use it. There is no advantage creating the PDF with _EXPORT (compared to _PLOT).

- alfred -