The template is gone... so I have found it and pasted it here.
Problem description
Shadows with a height of zero are meant to be infinite. This is not the case.
Example CAPX
https://1drv.ms/u/s!Am3CPIM7woZ9g7Qn-JBJTJHHTAKAgw
Steps to reproduce
I have set the ShadowLight's position to the mouse X and Y.
Move it onto the Xs to see the issue.
Observed result
The shadows only appear to stretch on for a short distance.
Expected result
The shadows are meant to be infinite. The exact same capx when opened in C3 works as expected.
System details
R266, Windows 10, tested on everything.