i did have this problem And got around it by doing a Graphics setup.. somthing like:
i think you CAN only do this once so i opt todo it when you create the canvas.
i would have a look a the sample programs tho. have a look out at the rockout_gui one and your see what i mean
edit: search for the line that says SetGraphics CanvasGraphics (canvas) most of whats after this is all graphics setup just like you would normally do.
SetGraphics CanvasGraphics(mainRenderView)
SetMaskColor 255, 0, 255
i think you CAN only do this once so i opt todo it when you create the canvas.
i would have a look a the sample programs tho. have a look out at the rockout_gui one and your see what i mean
edit: search for the line that says SetGraphics CanvasGraphics (canvas) most of whats after this is all graphics setup just like you would normally do.