When you use the
InsertImage tool to insert a PNG image over another PNG image in RadImageEditor, and the original image loaded in the control has transparency, the transparency is lost when
CanvasMode is set to
The solution is to set
Auto for browsers that support it.
The problem in the original setup is caused by the use of the GDI+ library on the server. When the HTML5
<canvas> is not enabled, the InsertImage operation is performed on the server, otherwise it is performed in the browser where it works as expected.