You could do this with a script in the OnRender event of your tease graphic.
This script (just an example) will clear the 5 layers below whichever layer your tease scene is on, whenever the scenedirector gets to frame 10.
dim i as integer
dim framebuffer as integer
dim layer as integer
if self.isonline and self.scenedirector.position = 10 then
self.GetOnline(framebuffer, layer)
for i = (layer-5) to (layer-1)
engine.clearframebufferlayer(framebuffer, i)
next
end if
#XPression