Baked Lighting Issue

Unity Engine
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1

Almost all of my other threads get ignored so maybe the general discussion page can help.
When I bake my lighting, it looks like this:

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It might be because my walls are transparent on one side (I did this to save memory.) How can I fix this issue without making my walls double-sided?
Please help, this is very frustrating.

2

You can find “Double-Sided Global illumination” option from your material inspector. Activate it to fix double sided faces problems.

3

I’m a beginner so I’m probably making a stupid mistake but I don’t see “Double-sided global illumination” anywhere

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4

You need 5.6.1 patch 4 or higher

5

Im downloading “Unity 2017.1.0f3” which seems to be the latest patch. Is this correct?

6

So I got the patch, but the “double sided global illumination” box is gray and I cant click it. What do I need to do first?

7

Yes. It’s correct

Create a new material with standard shader and assign it into your object

8

It worked (sort of) but when I bake lighting all of the object in my scene lose their shiny properties. Nothing is reflective. I also still cannot enable double-sided global illumination.

9

Use reflection probes :

https://www.youtube.com/watch?v=FkOYKY62uTE