I'm sorry, this seems so silly, but I'm stumped...

Wrangling an Anime FBX import, I accidentally added a transparency map to a material that does not have one.

How do I delete map and revert to 'blank' default ??

I've tried the 'usual suspects' of no/shift/ctrl left-click/right-click etc etc, peeked in 'Advanced', almost deleted entire model several ways, but never the map...

Same seems to apply to materials' other maps. If in Poser manual, neither index nor search can find it...

FWIW, the material room list ergonomics sorta 'falls over' if there's enough materials to go beyond a page, as you must spend ages scrolling with the teeny-tiny up/down arrows. Gets silly with 40 ~~75+ materials. One model had 90-some !! And list always reverts to showing first page. And such tiny font ? 'Western' is hard enough to read, but when you meet a swathe of glyphs, you'll struggle. I've resorted to having any bundled OBJ's MTL open to 'compare & contrast'. Okay, they're often not in exactly same order, but that's trivial...

In simple view in the Material room, click on the transparency map thumbnail, (bottom right) and a new pop up window appears allowing you to browse for a new transparency map. Above the browse button in this window is a little down pointing arrow, click on this and the first option is none, select this. Then make sure you have set the transparency value back to zero.

Thank you, thank you...

'none' !! So simple...

And, not referenced by Poser manual...

Get used to working with the Advanced portion of the Material Room. Despite all the nodes and noodles, it is the best place to get the results you want. Most content materials are not very complicated unless you're bagginsbill who can generate hundreds of nodes for specific effects.