2010 ISSUES ?

[rytra]

I am plotting a dwg file to a pdf in 2010 but when my pdf pops up I can not see the x-ref'd background. The x-ref is a tiff. image that was imported through the attach raster image command. I can see all my linework, but the image I drew over is missing. Plot preview shows it there. I have been dealing with this for sometime now and was wondering if anyone could help.

Thanks,

Ryan

[rkmcswain]

Does it do the same thing if you plot to DWF or some other type of plot file?

[gflores_84990321]

i've had the same problem here at the office too... plotting to PDF and plotting to paper... everything shows to be there, but doesn't show up on the finished product... not every time, but once and a while... haven't found any solutions or causes to it yet...

[dgorsman]

One thing I have seen with attached images, is the color being set to a TrueColor rather than the AutoCAD "WHITE". TrueColor will attempt to plot its color regardless of the plot style setting (at least in CTB - not sure about STB), so it will be virtually invisible on a print.

Short story: check the color of the image (or layer, if the image color is BYLAYER).

[rkmcswain]

TrueColor will attempt to plot its color regardless of the plot style setting

Right, truecolor will always plot in truecolor, plot styles don't apply.

[rytra]

I have not tried to see if it still does it when plotting to DWF. I have not been able to figure it out, but it does not happen on every sheet. I will check the true-color option of the tiff. and change it to see if that makes a difference. (sounds like it could be the problem).

Thanks guys for your responses, I have 2010 at home and it does not do this!

Ryan

[Mtn Biker ARM]

Mine does similar.

When I plot to pdf, the tiff images in the viewports of SOME layouts (not all) turn out "choppy" (see attached picture).

The image color is set to "white" and it plots fine on the plotter and DWF. I've tried changing multiple settings in the pc3 file, but it always does it.

I don't know why it is not consistent between layouts. It is very annoying - I must make pdf's for a client and they are not going to look good. FRUSTRATING!

[rytra]

Well I may have figured out my problem. I opened the Tiff. image in Adobe photoshop and it was saved as an RGB Color in the image/mode menu, I switched it to bitmap and saved the file. Now the pdf's are actually looking really good. I don't know if this is the solvent to the problem but it worked for my files. Hope this helps out!

Ryan

[Mtn Biker ARM]

That's interesting, I will try turning it into a bmp. Thanks.

I was playing around with it yesterday afternoon and figured that it had to do with the DVIEW twist in the viewport. For this particalar viewport the twist was about 313 degrees. I noticed that anything beyond 300 degrees or so, and the picture would be choppy in the pdf. If it was less than that it was fine. Interesting.

Aaron

[vtmiii]

we convert TIFFS and BMP files to JPEG for two reasons 1) it cuts down on file size.
2) we have never had a problem with JPEG's.

[cadtag]

for photographic type images, jpeg (Joint Photographic Experts Group) is marginally fine. for anything else, it's not. Remember that jpeg was developed as a 'lossy' format for photographs. Any image file you convert to jpeg is not only going to be smaller than the original, it's going to lose information - and that information can never be recovered.

I'll recommend you look into the .png (Portable Network Graphics) as a lossless compressed format that seems to work equally well on line art, photographs, and hybrid images. Still small, but nothing gets thrown away during the compression, and all information that was there originally is still there and can be extracted.

BMP is pretty far down the list of useful imagery formats, unless you use very little. It's probably the bulkiest format around.

[RobertB]

...I'll recommend you look into the .png (Portable Network Graphics) as a lossless compressed format that seems to work equally well on line art, photographs, and hybrid images. Still small, but nothing gets thrown away during the compression, and all information that was there originally is still there and can be extracted.I concur. And PNG also has transparency.