This bug keeps appearing in X3, X7 and now again in X8. Create a graphic in CorelDraw and apply a standard transparent lens to the object, export as a transparent PNG. It should be transparent so when used as a PNG it's a lens.
Currently it is exported as a solid. Time to find my CorelDRAW X5 CDs and install it so I can work on the graphic needed.
See below, the grey box has a lens of 50% applied to it, you can see this over the blue box. When exporting the rest of the grey box is a solid - it should be a PNG transparency.
Opened up X5, and it appears that the Lens does not working there either, but Transparency does. So that's the difference.
Can the team take a look at Lens and see what they behave differently when exporting to a transparent PNH.
Below is a screenshot of a transparent graphic in X5.
It works as designed
I think that it would be better if transparency were not even an option for new Lens effects. That's just one of many lens effects, and I don't know if any of the other ones have the ability to remain "live" when exported to PDF or PNG (compared to the transparency that is available through the Transparency Tool or Object Properties).Sometimes a feature that has outlived its usefulness become a liability. Perhaps they could program it so that it still supported existing transparency lens effects in legacy files, but would not provide the opportunity in the UI to create new ones...An observation: If I apply a transparency to something using the Transparency Tool or Object Properties, then I note that the Object Manager shows the word "Lens" under that object. What a great way to create confusion!
The transparent object in CorelDRAW was transparent in the PNG. If it was placed in another application the transparent object would be transparent. Not sure that transparent PNG's are not just for placing.