The information in this Wiki Page applies to TANE, TRS19 and Trainz Plus. This guide covers the use of procedural track in Trainz Surveyor, not how to create procedural track assets.

What is Procedural Track?

Procedural tracks provide animated switch points plus check rails and frogs at track junctions

Procedural track works just like the standard pre-TANE track (non-procedural track) but provides additional cosmetic features.

Procedural Track

Non Procedural Track

The switch blade animation will show in both Driver and Surveyor but in TRS19 Platinum Edition and Trainz Plus the Pause option in Surveyor must be checked OFF (no tick).

Procedural Track

Non Procedural Track

These features are built into the track asset and do not have to be manually added when laying track.

Laying Procedural Track

The "fall-back" position for procedural track is to act and look like ordinary (non-procedural) track

Procedural tracks are laid down in Surveyor just like any other track. Track junctions are formed in the same way as they are when using non-procedural tracks. The difference is that the additional features (animated switch blades, frogs and check rails) are automatically added when a track junction is correctly formed using procedural tracks.

Faulty (incorrectly formed) procedural track junctions will work perfectly well as non-procedural junctions - they can be switched left and right, and trains will pass over them correctly. But the special features that they have will not appear.

A red track spline circle indicates that the procedural track junction is faulty

Faulty procedural track junctions are indicted in Surveyor by:-

solid red track splines, or
flashing red/white or red/yellow track splines

Procedural Track Errors

Some of the most common causes of red track splines are listed below. But remember, that the presence of a red track spline does not stop the track junction from working correctly as a non procedural track junction.

Incompatible Tracks
	Fault: One of the tracks used to form the junction is not a procedural track Solution: ignore, or if possible replace the non procedural track with a procedural track
Curve Too Tight
	Fault: One of the diverging tracks has a curve radius that is too tight Solution: increase the curve radius
Track Splines Not Level
	Fault: The spline points that define the junction are not at the same height Solution: adjust the spline heights to create a level junction
Junctions Too Close
	Fault: A second junction has been added that is too close to the first and there is not enough room for the frogs/check rails to be added to the first junction Solution: adjust the placement of the second junction to allow the frogs/check rails to be added to the first junction