I have created an image in PowerPoint, then saved it as WMF format. After that I used Adobe Illustrator to convert it to EPS, but it appears different and black edges appear.
I have found WMF very poor format for transferring stuff from MS Office to Ai. Why:
- curves are replaced by dense polylines that are hard to edit in Ai and often a mess due the open curve fills
- unpredictable shape doublings, clipping masks, compound paths, groups and rectangles exist
- uneditable or totally vanished texts
The EMF format at least retains the curves, but to make any edits, a big bunch of clipping masks must be released. Often a small object has a huge frame that appears to be a compound path or a group. The texts finally are editable after releasing a lot of clipping masks, compound paths and groups.
I have found copying from PowerPoint and pasting in Illustrator to be much more effective (=less effort to make it editable) way to continue in illustrator. Still must hover the mouse over the image in Illustrator to find hidden rectangles and large frames that actually are groups or compound paths or consists clipping masks.