In Modeler you can choose either 24 or 32 bits when rendering in PNG.
In Workspace, there is no such option.
Does anyone know a trick to save transparency/alpha from a Workspace render ?
Render PNG 32 bits in Workspace
Re: Render PNG 32 bits in Workspace
Answering to myself : TGA export format is a 32 bits one. So TGA is the format to choose instead of PNG if you need to save transparency in a Workspacer render.