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The Doom Wiki article on STRAIN wrote:
MAP07: En Route is impossible to complete in modern ports such as ZDoom, as the level relies on the occurrence of a spechits overflow in order for the exit to work. There also problems with the DeHackEd patch when it is used with Doom Legacy.

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EarthQuake said:
but my guess is that it was some hard-coded limit that ZDoom lifted.

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I think "spechits" probably stands for "special hits", as in "linedef special activations".

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EarthQuake said:
There is also another way of doing it, but it involves some weird method using dummy linedef of some sort.

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esselfortium said:
I wonder if a similar trick could be used as a cleaner, non-damaging way to do multi-trigger switches in vanilla? o_O

edit: Aww. Unless I did something wrong, it doesn't work. It seemed like a good idea though :P

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Gez said:
I'm surprised you don't already know about this trick.

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Graf Zahl said:
In addition the 'right scroll' trick is more or less useless due to the narrow limit of 64 scrolling linedefs per level. You'd reach that faster than you might think when trying to create animation tricks.

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EarthQuake said:
Wait, so if a map hasn't had it's sidedefs compressed, then the trick will work?

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myk said:
[B]It works on many other engines running vanilla levels, and PrBoom/+ also allows things to work with v1.9 compatiblity (-complevel 2), which is widely used by demo fans and people who want to ensure vanilla WADs behave as tested. Not using it just inhibits a vanilla possibility. It's easy to just recommend something more vanilla friendly than ZDoom in the text file.

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Graf Zahl said:
If you need a Boom-compatible port to get around the limit, why not use a Boom-compatible means to achieve the same thing? At least that's guaranteed to work properly everywhere.

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So yes, if vanilla compatibility is of paramount concern - feel free to do it but expect problems elsewhere.

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myk said:
You don't need such a port, and the level doesn't work properly everywhere anyway.

It definitely is, in a vanilla level. The only true standards for what a "vanilla level" is are Doom/+ (first), Chocolate/Strawberry Doom*, and PrBoom/+ at -complevel 2 (or 3/4). Anything else is optional and might break or alter some of the vanilla functionality in some way. Using one Boom feature in a completely vanilla level, when that feature works in vanilla directly just to make a vanilla level work in non-vanilla engines is a mistake; the resulting level isn't a vanilla level. Either use the hack, be more conservative and use only normal scrolling walls, or use Boom features more or less freely instead (aiming for a Boom level, and testing with Boom and PrBoom/+ at -complevel 9 plus any optional engines).

* I had forgotten Strawberry Doom, that is a Chocolate Doom offshoot that behaves like Doom+.

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esselfortium said:
instead of using that trick anyway and requiring people to use Doom2-Plus, just making the map Boom-compatible and having it work properly in the majority of sourceports instead of a very small percentage of them.

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