fix for nonsquare images

v1.0.4

fix for nonsquare images

fix for aframe<=0.5.0

v1.0.3

tweak for frame>0.5.0

fix for aframe<=0.5.0

v1.0.2

update example

polishes, mostly to material choice

also improves ignoreZeroValues and ignoreTransparentValues

first release

v1.0.0

introduce stackblur min