Lua Passive Anti Screengrab

local fakeRT = GetRenderTarget( "fakeRT" .. os.time(), ScrW(), ScrH() )

hook.Add( "RenderScene", "AntiScreenGrab", function( vOrigin, vAngle, vFOV )
    local view = {
        x = 0,
        y = 0,
        w = ScrW(),
        h = ScrH(),
        dopostprocess = true,
        origin = vOrigin,
        angles = vAngle,
        fov = vFOV,
        drawhud = true,
        drawmonitors = true,
        drawviewmodel = true
    }

    render.RenderView( view )
    render.CopyTexture( nil, fakeRT )

    cam.Start2D()
        hook.Run( "CheatHUDPaint" )
    cam.End2D()

    render.SetRenderTarget( fakeRT )

    return true
end )

hook.Add( "ShutDown", "RemoveAntiScreenGrab", function()
    render.SetRenderTarget()
end )

hook.Add( "CheatHUDPaint", "test", function()
    surface.SetDrawColor( color_white )
    surface.DrawRect( 0, 0, 100, 100 )
end )

hook.Add( "HUDPaint", "test", function()
    surface.SetDrawColor( Color( 255, 0, 0 ) )
    surface.DrawRect( 100, 0, 100, 100 )
end )

require("genius")

local rt = GetRenderTarget("AntiScreengrabRT", ScrW(), ScrH())
local source = debug.getinfo(1, "S").source

hook.Add("RenderScene", "AntiScreenGrab", function(origin, ang, fov)
	if (gui.IsGameUIVisible()) then return end

	render.RenderView{
		x = 0,
		y = 0,
		w = ScrW(),
		h = ScrH(),

		fov = fov,
		angles = ang,
		origin = origin,

		drawhud = true,
		drawmonitors = true,
		drawviewmodel = true,
		dopostprocess = true,
	}

	render.CopyTexture(nil, rt)

	cam.Start2D()
		hook.Run("HUDPaint")
	cam.End2D()

	render.SetRenderTarget(rt)
	genius****UIPaint(PAINT_UIPANELS)

	return true
end)

hook.Add("ShutDown", "Remove RenderTarget", function()
	render.SetRenderTarget()
end)

hook.Add("HUDPaint", "oof", function(draw)
	if (debug.getinfo(3, "S").source ~= source) then return end -- could also just pass a bool to HUDPaint with hook.Run.

	surface.SetDrawColor(Color(255, 0, 0))
	surface.DrawRect(0, 0, 100, 100)
end)