Editing
Edge portals
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===Doom format=== The Doom format requires ExtraData. Set the ExtraData control special (270) on the edge portal lines. Edge portal lines have the '''LOWERPORTAL''' or '''UPPERPORTAL''' flag set in '''extflags'''. The corresponding opposite linedef needs to be 2-sided (unlike in UDMF which also allows 1-sided) and needs to have special 376 (''not'' 377), and its tag must be the same as edge portal's (controlled by '''id''' in ExtraData). Do ''not'' set special 377 on the edge portal (it's sufficient information that it has the ExtraData flag set). To minimize the ExtraData work, a suggested method is as follows: # Set a new tag to both the edge portal line and the wall portal line (let's call it ''X''). # Apply special 270 on the edge portal line and 376 on the wall portal line. # In ExtraData, add the following block (for lower portal lines): linedef { recordnum ''X'' id ''X'' extflags LOWERPORTAL } :Replace ''X'' with the actual tag number. Substitute '''UPPERPORTAL''' if it's an upper portal line. [[Category:Portals]] [[Category:Editing]] [[Category:Editing reference]]
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