PC Engine tile viewing/editing

From ethylene <xxxxxx@viclink.com>
Date
I beg your pardon if this is a silly question...

Can anyone tell me of a tile editor, or of a config file for an existing
tile editor that correctly decodes PC Engine sprite bitplanes?  I've tried
about ten different utils thoroughly, and haven't had compete success.  I've
gotten several backgrounds and font tables with several editors, but sprites
seem to be a problem.

The closest I can get to seeing correct sprites in Exile, for example, is
with a 4BPP decoder and a tilesize of 8x16.

So, is this an easy question to answer?  Again, sorry if it's a weird
question.  I'm just an amateur dabbling into this stuff for the fun of it.