Bug: refract shader don't render portal correctly behind a wall

[kiddu25]

Describe the bug

as you can see the refract shader will not render portal correctly

portalizer.zip

2026-03-20.23-02-33.mp4

To Reproduce

1. open the map
2. shoot a portal on white wall
3. see behind the wall

Issue Map

anymaps that have refract shader(or the texture that i have ?)

Expected Behavior

portal will not render correctly

Operating System

windows 10

[lenship2]

as a temporary fix try converting the glass brush into a func_brush and setting the render mode to glow