I'm not sure if this is a bug or a feature in pak128 but there is no grid visible in underground mode. A related old topic here
https://forum.simutrans.com/index.php?topic=14068.0 (https://forum.simutrans.com/index.php?topic=14068.0)
There is an easy fix for this.
In image
pak128\landscape\grounds\borders.png
replace grid color #000000 with #202020
Now we have some guidance when building underground.
(https://i.imgur.com/V2Qo6Pp.png)
For convenience I attached a modified 'borders.png' image below.
the grid is black in pak128
black grid -> black background -> no visible
As I have been playing only pak128 I never thought of having a grid underground. I used to build underground networks using coordinates ;D
I'm putting your file in the repository right now, thank you ;)
Quote from: gauthier on March 10, 2018, 10:20:02 AM
As I have been playing only pak128 I never thought of having a grid underground.
Well, it depends on taste. But Simutrans help files make reference on using grid when working underground, especially in slice mode view.