My sig is white on a black background so I can use it as a layer in PaintShop Pro, move it, screen it and then use 70% transparency. Can be enlarged and use a lower %transparency to watermark an image. An alternative is black on white then multiply the layer and set the transparency.

Photo of Cambridgeshire Fens at 9.30pm last night

Poser 11 , 180Gb in 8 Runtimes, PaintShop Pro 9
Windows 7 64 bit, Avast AV, Comodo Firewall
Intel Q9550 Quad Core cpu,  16Gb RAM, 250Gb + 250Gb +160Gb HD, GeForce GTX 1060