# Nested block visibility problem

**URL:** <https://discourse.mcneel.com/t/nested-block-visibility-problem/150157>\
**Category:** Rhino for Windows\
**Tags:** windows\
**Created:** [November 4, 2022, 3:47pm UTC](https://discourse.mcneel.com/t/nested-block-visibility-problem/150157 "2022-11-04T15:47:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nscross](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/nscross/32/505316_2.png) [@nscross](https://discourse.mcneel.com/u/nscross)\
**Post date:** [November 4, 2022, 3:47pm UTC](https://discourse.mcneel.com/t/nested-block-visibility-problem/150157/1 "2022-11-04T15:47:24Z")

</div>

Hi! I’m having a strange problem with nested blocks, involving having a double sided material in the file.

It comes and goes, but Ive discovered that if I have a double sided material in the file some nested blocks are not visible in rendered mode. They are fine in shaded, arctic etc.

Shaded mode:

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/d/d/a/dda1fdebf2666382b215270478862390208c8d36.jpeg)

Rendered mode: (no monitors show up)

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/9/6/5/965a85aaea55741e84bd7b5508edfe41f3925d09.jpeg)  
File attached.  
thanks!  
[NestedBlocksProblem.zip](https://discourse.mcneel.com/uploads/short-url/ptGHAxPn7VmXTmJEuUPQJ84wJfv.zip) (16.7 MB)