Dual-channel displacement maps

Hello,

I'm curious about Dual-channel displacement maps. Its a bit confusing because I don't know how to apply them.

When I use grayscale displacement maps, I save it as a psd. and the apply it via the displace filter.

How do I apply a dual-channel map? Do I save the Red (right to left) and Green (up to down) as separate .psd and then apply them or is there some other way?

Any advice is appreciated...

Regards
Fess

In fact, they need to be in the same file, you could even have a third channel, but it won't be used. you just need to point to the psd file and it'll distort the base image accordingly.

Tech-slop, the best page about displace is currently down, in the mean time, check out http://www.gurusnetwork.com/tutorials/photoshop/displace1.html and http://www.adobeevangelists.com/pdfs/photoshop/neworupdatedfor6PS6/DisplaceFilter.pdf

sPECtre,

Great resources, thanks again buddy. I'll look into it.

Thanks
Fess