One way mirror glass

[smeghammer]

I was playing with line portals, translucency and mirrors and came up with a nice reflective one way glass construct. I thought it looked really cool so I thought I'd share how I did it.

 

Disclaimer: I map in DiHF, so there may be another way to do this in UDMF...

 

Anyway:

Essentially, I use a one-way portal to simulate the translucent side and a mirrored linedef to simulate the reflective side. Translucent linedefs are used in front of these to make it look more realistic.

 

Summary:

So, you create linedefs as close together as possible, flagged like so:

 

OUTERMOST (mirrored side)
a--------------------- 156 (line_setportal), 0,1,0,0

b--------------------- 208 (translucentline) midtex for glass (e.g. COMPBLUE), 0,120,0,0 (the colour we want our mirrored glass to be)

c--------------------- 182 (line_mirror) No args, hence the 208 line in front...
VOID HERE
VOID HERE              Void here cos we are not actually using a transparent sector...
VOID HERE
d--------------------- [no special, tex not important]

e--------------------- 156 (line_setportal), 1,2,0,0. This is a portal to the one above, line 'a'.

f--------------------- 208 (translucentline) midtex for glass (e.g. COMPBLUE), 0,120,0,0 (the colour we want our see through glass to be)
INNERMOST (translucent side)

 

Steps (In Eureka editor):

Spoiler

 

Mirrored side:

a: visual portal on the outside. We are looking out, not in, so we only need the self line ID:

 

b: A translucent line, textured as you prefer (MIDTEX) to simulate the mirror colour, if wanted.

 

c: Line against the void. Give this a mirrored linedef. There are no arguments, hence the need for the translucent line in front.

 

Translucent side:

d: Other side of void space. No specials needed.

 

e: The other side of the line portal. We are looking though this one to the outside (a: above):

 

f: And a translucent line so the simulated glass looks more 'glassy'...

 

 

 

 

Demo video:

Spoiler

 

 

 

 

And a download for the demo WAD:

https://github.com/smeghammer/snippets/blob/master/1wayglass/1wayglass.wad

 

 

 

 

 

Edited April 3, 2023 by smeghammer
fixed broken images