Can background videos be toggled on and off for Stepmania...

during gameplay? Or can this only be done from the main menu?

The default theme has options (if you have additional options enabled) to let you use a song's default BG (the .sm's background changes), static BG (song's background image), and random BG (cycles through videos in your RandomMovies directory). Not sure about other themes.

Ah, you see my problem is I'm bringing my setup to a convention and have to have the second set of options locked when attendees play it. I was hoping there was a way for them to toggle the videos on and off at their discretion without accessing the second menu.

Add an option row for setting BGBrightness to the options screen of your theme. 0 turns it black, 1 turns it full brightness, in between makes it faded dark.

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How do I add that option? Do I write it into the code?

Metrics:

# Add bgoff to the LineNames metric.
Linebgoff="lua,ops_row_bgoff()"

Scripts:

function ops_row_bgoff()
local choices= {1, .5, 0}
local names= {"BG On", "BG Dim", "BG Off"}
-- Add OptionTitles::bgoff and OptionExplanations::bgoff to en.ini
return {
Name= "bgoff",
LayoutType= "ShowAllInRow",
SelectType= "SelectOne",
OneChoiceForAllPlayers= true,
LoadSelections= function(self, list, pn)
local brightness= PREFSMAN:GetPreference("BGBrightness")
for i= 1, #choices do
-- Check how close the brightness is to each choice and pick the closest one.
local this_diff= math.abs(brightness - choices[i])
local next_diff= 1
if i < #choices then
next_diff= math.abs(brightness - choices[i+1])
end
if this_diff < next_diff then
list[i]= true
end
end
end,
SaveSelections= function(self, list, pn)
for i= 1, #choices do
if list[i] then
PREFSMANetPreference("BGBrightness", choices[i])
end
end
end,
Choices= names,
}
end

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Shouldn't this code yield results similar to the "BGA DARK" option in PIU PRIME 2?