so I ran a model at 4000x2000 size with 200 passes. keep getting those jagged edges - especially on the angled lines. Any hints? Bigger size or more passes? Its being used at about a 5"x7" size inserted into a document, just can't get it to look right.
Larry
Replies
I'll check with the cadd software people, but keep in mind, this pdf was created using adobe acrobat as the printer so not sure what the cadd software has to do with it. I quickly checked and there is no setting available in the cadd software that would allow any adjustments. But then I need to ask what happened with the powerpoint pdf. Did powerpoint also reduce the dpi or pixels?
When I open your file, MOBILECARTGENERICCADD.pdf, in Adobe Acrobat, and select copy the image in it, and paste it in Paint, I see that it is 1553 pixels wide. (The image in the PDF is saved as a set of horizontal strips, but each strip is 1553 pixels wide.)
Your original rendered PNG image was 5000 pixels wide.
So, even thought you are saving the PDF as 2400 dpi, that is not what you are getting.
When I create a PDF from your image using Photoshop, or Adobe Acrobat, the image embedded in it is still 5000 pixels wide and looks fine, even when I zoom in on it.
So I suspect that the CAD program that you are using to make the PDF is changing the resolution of the image and losing quality. Are you sure that there is not a setting in that program that allows you to keep the original resolution of the image?
Also, I notice that the image in the PDF is a cropped version of the rendered image that you included. Is it possible that the cropping process changed the resolution?
Need to resurrect this again, its become a major problem for me and really desparate. It would seem that irdener is producing pretty good quality results. I'm attaching a view, run at 5000 x 1000 with 20 passes. I put it into one of my cadd programs, print to adobe acrobat as a pdf, hi quality print, 2400 dpi, and I get jaggies like crazy - especially when you zoon in to the angled lines. So I thought maybe the cadd program. Tried to insert the images into powerpoint, print to pdf, same results. Attaching images appropriately labeled. I assume this is not an irender issue unless I really need to run more passes, but has anyone else come up with similar issues and figured out how to print higher quality pdfs?
MobileCart GENERIC RIGHT.png
MOBILE CART GENERIC POWER POINT.pdf
MOBILE CART GENERIC CADD.pdf
just uploaded via hightail. please keep any display of images with branding confidential.
Rich, just following up. Any suggestions?
Not really. The jagged edges seem to be a result of the very white faces next to the very dark faces. There is some dithering there, but obviously not enough to smooth out the edge.
The only suggestion that I would have is to apply one of the the smoothing or softening filters to the rendering.
Why are the white surfaces so bright? Are they faces set to be light sources?
Hi
This has been covered in a previous thread - see here
http://forum.irendernxt.com/forum/topics/aliasing
Hope this helps.
Regards
Mike
thanks Mike, but not sure if I fully understand. I'm already at 4000x2000 with 200 passes. The other thread mentioned 600 pixels and only 10 passes. Would seem I've enlarged it quite a bit more with quite a bit more passes. Not sure what I do at this point.
Larry
Hi Larry
I think it's the bit about re-sizing / re sampling in a paint programme you need to look at (eg Photoshop)
I think you render oversize, as you have done, then manipulate it in the paint programme.
I don't seem to get 'jaggies' when I render so not sure if there is another setting within the renderer you need to look at ?
Hope this helps.
Regards
Mike