displacement map bug?
by christian kim on Aug 29, 2010 at 8:16:02 am
Hi everyone, i am running into odd behaviour from displacement map.
basically, i have made a black and white animation to use as displacement map. and black is total black R0G0B0.
when i use displacement map effect using the map, the layer will "shift". i think basically whats happening is that, even though the displacement map is currently black, 50% displacement is still applied.
my understanding would be that black means no displacement, white would be full displacement. basically as soon as i apply displacement map effect, the whole layer will just shift by half the displacement.
i have looked up google and creativecow, but no luck.
Re: displacement map bug? by Matthew Keane on Aug 29, 2010 at 10:53:10 am
If I recall, mid-grey pixels should result in no change, while white and black will give the maximum displacement in opposite directions. So, for a horizontal displacement, black (0) would give the maximum shift to the left, and white (255) the maximum shift to the right, while any mid-grey (127) pixels won't create any displacement.
To be honest though, I can never remember for certain whether it's white or black which gives the negative displacement, so you should probably go look this up!