> So, method 1 is recognised by PoV-Ray but not method 3. It still > leaves the question of what method 1 is good for compared to +a0.0?>
+a0.0 is useless. It will supersample even if there is a completely
color. Even +a0.001 could be useful in some cases, but +a0.0 is simply a
waste of CPU time...
