Board Thread:Suggestions forum/@comment-26456694-20170710115846/@comment-26172435-20170710140549

Should be possible by simply making water blocks produce particle effects of a steamy nature when placed within 2-4 blocks above a source of heat, which can be a furnace, a burning hearth block, a lit beacon or fire.

By the way, a layer of heather has been proposed before, but for the purpose of creating a bed. ;)