How to remove shadow from elements?

Question

Qt

Please tell me how to remove the shadow from the form elements. Previously, they did not have a shadow, but a neat frame, but then something happened and now all the elements on the form are surrounded by the most ugly shadows. And this is absolutely true for all elements, even for QMessageBox. Here is an example:

It used to be like this:

Answer 1

It seems that you are resetting the application style to QWindowsStyle , try manually setting another one, for example QWindowsVistaStyle .

Answer 2

Thank you all for your help. I solved the problem by changing the build mode from release to debug