I'm not entirely sure what your asking, are you asking about making converging routes show an aspect other than clear (G/R/R)? Something more prototypical would be R/G/R or Y/Y/R or any number of variations depending on the turnout speed and track conditions ahead. In most cases, with more complex junctions, a clear would only be shown if the route was lined for an absolutely straight path from beginning to end. This is why the setup for JR's 08's and 06's has that request. From the direction you would be travelling facing the signal, you would setup the direction of each junction needed to produce that straight line. Anything else that results in a valid path through would show a reduced aspect. Anything that is not a valid path would obviously show a stop unless you have multiple signals set up in the junction, which is generally unprototypical and unnecessary (even with dumb AI).
Remember that switch direction for setting this path becomes "backwards" for converging lines. That is, Trainz looks at the signal from the direction of the diverge, always and reports it this way. So when setting up the straight path you need to remember to look at these switches from the opposite direction of the path to get the proper setting.
Getting more into what I think is the heart of your question (I hope) is the lines that end at the converge (the end of a passing siding, perhaps) when setting up these routes you would want to set the signal to read the straight path as the main route, even though your signal is on the siding. The signal will read the completed path as valid but see that switch directions indicate not a straight path, therefore giving a reduced something to clear signal (R/G or R/Y, depending on conditions as said before).
I'll try to give some examples instead of going to bed, but that's ok because I'm not overly tired which is odd considering I've been awake for 32 of the last 36 hours.
I'll start basic, you've all seen this before and are probably wondering why I'd bother showing it, but anyway... Consider the following route:
Code:
[I]A[/I]--------------------[I]B[/I]
/
[I]C[/I]---------
Set all three signals (could be 08's but since it is simple we'll say 06, but either would work) for a straight path of "R". Presuming all other lines are clear, Train at signal
B, lined for
A,
B would show G/R. Same with train at
A lined for
B. But a train at
B lined for
C would show R/G (or Restricted [to] Clear) meaning take the turnout at restricted speed then resume speed once clear of the junction. The same would be true for train at
C lined for
B. Obviously if the switch was against the train at
C (set Right) it would still see R/R since there is no valid path, even though we've set the "straight line" as right.
Here's the important part though. If you don't look at the junction "backwards" (from the diverging direction) when setting up signal
C and set it for L instead, it would instead indicate G/R (All clear) for the
C train and the train would go through the 15mph turnout at 60mph and probably fly off the tracks.
I'll try another more complicated one. My apologies if this gets wordy.
Code:
[I]I[/I]--- -------[I]H[/I]
\([U]AI[/U]) /([U]BH[/U])
[I]A[/I]-------------------------------[I]B[/I]
\([U]AC[/U]) /([U]BD[/U])
[I]C[/I]-------------------------------[I]D[/I]
\([U]CE[/U]) / ([U]DF[/U])
[I]E[/I]-------------------------------[I]F[/I]
/([U]GE[/U])
[I]G[/I]-------------
This one gets tricky. I've named the junctions too just to help. Assume all are 08's, but again 06's could work. Straight paths would be:
A = LR (again, remember to look at
BD from the diverging direction)
B = RL
C = LLRR
D = RRLL
E = LRR
F = RRL
G and
H = anything other than L (this would probably be more like an 06 in the real world, in actuality it would be closer, I think, to the previously mentioned 07's if referring to color lights since the aspect would always be red over something. Also I've not tested, but if you set it to RR it might display a lower aspect if DF is set left, don't quote me on that)
I = anything other than R.
I'll skip the straight through examples, those should be obvious.
A to
B gets G/R if
AC is left and
BD is right, yadda yadda... But now, let's say the train at
D is lined to go to
A, so
AC is right, it will therefore get the restricted to clear signal (R/G) indicating it is switching tracks. Similarly, with
G lined for anything (
H,
B,
D, or
F), because
GE MUST be lined left (again remember "backwards") it will always receive a restricted signal to proceed, regardless of whether it is going to
F or crossing all the way to
H.
Train at
I destined for any route similarly would get the R/G with
AI lined right, even if it was then lined for
H at
BH, because it must traverse the switches.
Probably a lot more indepth than needed, but does that make sense for converges? Or did I just confuse you more?
Here's the TL;DR: The setups for the signals are done in order from nearest to farthest, but remember to always take direction looking at the diverging directions. Signals for converging routes with no actual straight path should be setup so that the opposite route would be the "straight" as these signals would have no "straight". And one last thought, when using JR's 06 signals, it doesn't actually matter if you use the LD or RD versions, as you can set them either way - it only comes out preset for one or the other but you can always change it or add more switches to get that straight route.