Original:
function corridorsprite(flip, shader, minfr)
    local xpos;
    if flip == 0 then
        xpos = 0;
    else
        xpos = 500;
    end
    local w = 650;
    return game:addSprite{ shader = shader, alpha = 1, alphaVelocity = 0, scenePath = "Game/3DSpace",
	position = {240, 0, 0},
	vertices = {{w,xpos,-10000},
		{w,xpos,4250},
		{-w + 170,xpos,-10000},
		{-w + 170,xpos,4250}},
	rotation = {0, 0, 45},
	minimumFrameRate = minfr,
	alpha = 0.01,
	animator = {
	   duration = 0.01,
	   type = "float",
	   animatedProperty = "alpha",
	   startValue = 0.01,
	   targetValue = 0
	}
    };
end

My Modification:
-----------------------------------
function corridorspriteLand(flip, shader, minfr)
    local xpos;
    if flip == 0 then
        xpos = 0;
    else
        xpos = 500;
    end
    local w = 650;
    return game:addSprite{ shader = shader, alpha = 1, alphaVelocity = 0, scenePath = "Game/3DSpace",
	position = {160, 0, 0},
--[[	vertices = {{w,xpos,-10000},
		{w,xpos,4250},
		{-w + 170,xpos,-10000},
		{-w + 170,xpos,4250}},--]]
	vertices = {{xpos,w,-10000},
		{xpos,w,4250},
		{xpos,-w + 170,-10000},
		{xpos,-w + 170,4250}},
	rotation = {0, 0, 45},
	minimumFrameRate = minfr,
	alpha = 0.01,
	animator = {
	   duration = 0.01,
	   type = "float",
	   animatedProperty = "alpha",
	   startValue = 0.01,
	   targetValue = 0
	}
    };
end