I am trying to create a relief using an image as reference. The way i would like to do this would require to make the mesh transparent in sculptmode, but i can´t find this option. Any suggestions please?
In Cycles add a material to your plane and set up material nodes as pictured below (Mix Diffuse and Transparent nodes). With the viewport shading type set to Material set the Factor of the Mix node to adjust transparency as you like. In Material header-->Settings panel under the Viewport Color set the Alpha to 0.000.