Hi all and corel team !!,
Just wondering if there is a way to perhaps get a smoother drop shadow trace than this in attached sample...,
Is that pixel stepping a special effect feature that somehow I turn off , but wait a second... where is the turn off switch lol , seriously ... what is this ???
anyone...
or this is the best that can be done...
I have had this too......
The fix.............
Change the "Shadow feathering" any amount and it disappears.
Note: It happens when the object is rotated several times with a pre-made drop shadow.
My object had not been rotated at all, I just drew the shape, the problem appears on a straight line...feathering makes no difference...,
and besides why would I want to change the feathering as this defines the volume of my drop shadow which in this case has to be set where it is,
I would like to use a thin high contrast halo effect not a feathered blob of white light...
another ridiculous problem ...
Here is the full image, it had been reproduced by myself and I can assure there is no problems with my vector lines...
I see in your example the same as I see in my own which I redrew one element from your screen shot.
The shadow has steps in it on any low angle object.
Edit to add. My screen shot is from the resultant PDF. Looks the same in CD. Looks the same in an exported PNG.
great !! thanks,
I thought it was just me and I was going crazy...
Looking forward to hear from corel team....
Andrew said: and besides why would I want to change the feathering as this defines the volume of my drop shadow which in this case has to be set where it is,
You can change it right back to where you started.
Andrew
Try changing the rendering resolution (Options > Document > Page Size or simply double click the page frame).Does it make any difference?
Andrew said:the problem appears on a straight line
The essence of the problem is that it appears on a line that is almost, but not quite, horizontal.
There is is an inherent limitation in the print process. Shades of grey are rendered as halftone dots, which are each composed of tiny pixels at the device resolution. The number of possible grey levels is fixed by the number of device pixels allocated to each halftone dot. In conventional screening, all dots are identical and you can only add or subtract a whole pixel to each dot, Therefore even if the software tries to request a level of grey between that of two of the steps you are seeing, the output device can still only image to the nearest supported grey level.
It looks worse when the lines are almost horizontal, because then they are stretched over a long distance. A completely horizontal or vertical line, or even in the 20 to 70 degree range, would have the same number of steps spread over a much shorter distance and the eye would be unable to see the steps without magnification.
You may be able to improve the results by increasing the resolution. Printing at 2400dpi will theoretically allow 4 times the number of possible grey steps. Reducing the screen frequency (eg 50 lpi instead of 100 lpi) will do the same but may make for more obvious halftones.
Also look to see if your output device supports advanced grey level techniques. These increase the number of possible grey levels, either by generating halftone patterns where the dots for a particular grey level are not all identical, or sometimes by using random pixels instead of a a linear halftone screen. See http://the-print-guide.blogspot.co.uk/2010/01/fmstochastic-screening.html for additional information.