PNG Transparency with InsertImage Limitation

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 No.

The solution is to set CanvasMode to Yes or 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.