corel images with transparent background

genie wrote on 9/9/2009, 11:46 PM
Hi,
Its been a while since I used Corel and I am trying to create circular images with transparent backgrounds to overlay upon a video stream. I create an ellipse and powerclip the image to create a circular image but I can't get rid of the white 'square' background when I export it as a png. I thought the trick was something like 'convert to bitmap' with transparent background ticked but this does not seem to work. Anyone there able to refresh my failing memory?

thanks genie

Comments

DSCalef wrote on 9/10/2009, 12:04 AM
Try as a GIF instead of PNG and see if that works in Corel.

Also, the square white/grey checkerboard is for the transparent background, but perhaps you are not saving it as transparent. I recall having that issue months ago in Corel's Paint Shop Pro X2. It was a new feature use for me and I stumbled through it.

David
Former user wrote on 9/10/2009, 6:35 AM
You say that you're using "Corel" -- which Corel application are you using?

But, as far as PNG with alpha goes. When you save the PNG be sure and save as a 32bit, and when you import the image into Vegas set the image properties to use the mask / alpha channel.
JackW wrote on 9/10/2009, 10:26 AM
In Paint Shop Pro: Select "Export" on the File Menu; select "PNG Optimizer; select Transparency on the pull-down menu and set "Alpha Channel Transparency and "Existing Image or Layer transparency." That should do it.

Jack
xstr8guy@sbcglobal.net wrote on 9/10/2009, 12:21 PM
You have to optimize using 24bit PNG. The 8bit version is very pixelated around the edges and suffers from color banding. Set transparency to Alpha Channel Transparency. That will give you images with perfect transparent backgrounds
genie wrote on 9/10/2009, 7:03 PM
Thanks for the tips. I figured out how to do what I wanted to do. Open image in Coreldraw, create ellipse and powerclip to create elliptical image. Export as coreldraw file. Open in Corel Paint, click mask/create mask from image. Then export as png file with settings for mask set to zero. This then creates an image with transparency to allow the video to show through. Sheesh, that little process wasted some time!
Soniclight wrote on 9/13/2009, 12:56 AM
For some reason I have problems saving PNG transparencies with Corel older Photo-Paint 12--which I love to use, but not for PNGs. So I save as .PSD, then use open-source, free Gimp 2 to save as correct .PNG. A bit tedious.

However fortunately I don't use single .PNG in Vegas that often (but do use sequences saved out of Particleillusion 3).