Parameters

The source of truth is protocol/params.schema.json in the Showmesh repo; the table below is generated from it.

ID	Label	Range	Default fade target	Mapper	Unit	Applies to
video.opacity	Opacity	0…1	0	linear	%	video, image, text
video.scale	Scale	0…4	1	linear	×	video, image, text
video.posX	Position X	-1…1	0	linear	canvas	video, image, text
video.posY	Position Y	-1…1	0	linear	canvas	video, image, text
video.rotation	Rotation	-180…180	0	linear	°	video, image, text
audio.mainLevel	Volume	0…2	0	perceptual	dB	video, audio
audio.pan	Pan	-1…1	0	equalPower	pan	video, audio

"Default fade target" is the value a newly added fade starts with — not the parameter's resting value. It is why Add Fade Out lands on 0; an untouched cue still renders fully visible.

Resource and cue levels

final opacity = resource opacity × cue opacity
final volume  = resource volume  × cue volume
final pan     = clamp(resource pan + cue pan, -1, 1)

Common OSC addresses:

/resource/{resource-id}/opacity
/resource/{resource-id}/volume
/resource/{resource-id}/pan

/cue/{cue-id}/opacity
/cue/{cue-id}/volume
/cue/{cue-id}/pan

If a cue is silent, invisible, off-canvas, or unexpectedly small, inspect both resource and cue trims plus transform actions.