First of all thanks to 
Gigatron for this great Shader to render textured 3D cubes.
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After lots of requests after showing some videos about how do the teleglitch walls and 3d things with textures i released a template so everybody can play with it.
In the template you will find how do the
and how get the 3D shader working for topdown view.
About the the 3D shader, since not have camera parameters i had to figure out how to manage the correct projection for any height size. Maths are not 100% correct but enough to get nice results.
DEMO
Here to download the .rar with the .capx and .FX
https://www.patreon.com/posts/3d-template-for-11221540
Here a video showing what you will find in the template
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Here a gif showing this 3D techniques in a real game i'm working on: