# 4.11p1 tessellated materials don't compile or render

**URL:** <https://forums.unrealengine.com/t/4-11p1-tessellated-materials-dont-compile-or-render/342287>\
**Category:** Rendering\
**Tags:** unreal-engine, tessellation, question\
**Created:** [December 23, 2015, 4:43pm UTC](https://forums.unrealengine.com/t/4-11p1-tessellated-materials-dont-compile-or-render/342287 "2015-12-23T16:43:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![joe.real](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@joe.real](https://forums.unrealengine.com/u/joe.real)\
**Post date:** [December 23, 2015, 4:43pm UTC](https://forums.unrealengine.com/t/4-11p1-tessellated-materials-dont-compile-or-render/342287/1 "2015-12-23T16:43:19Z")

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Branch: binary  
Build version: 4.11.0-2810555+++UE4+Release-4.11

Problem 1. Any new or existing material with tessellation enabled from a converted 4.10 project fails to compile with error messages:  
MaterialEditorStats:Error: Error [SM5] DepthOnlyVertexShader.usf(140,29): error X3018: invalid subscript ‘EyeIndex’  
MaterialEditorStats:Error: Error [SM5] BasePassVertexShader.usf(86,29): error X3018: invalid subscript ‘EyeIndex’

Problem 2. Any new or existing material in a newly created 4.11p1 project fails to render without shader compiler error message:

Steps to reproduce (Problem 2):

1. Launch 4.11p1
2. Create a blank BluePrint project with starter content
3. Edit the M\_Chair starter content to enable tessellation and save → no shader error message, but the chair doesn’t render.
4. Create a new material, give it a visible base color and save, then enable tessellation and save → no shader error messge, but the material preview is blank.

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**Author:** ![anonymous\_user\_cc69b907](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_cc69b907](https://forums.unrealengine.com/u/anonymous_user_cc69b907)\
**Post date:** [December 23, 2015, 7:13pm UTC](https://forums.unrealengine.com/t/4-11p1-tessellated-materials-dont-compile-or-render/342287/2 "2015-12-23T19:13:56Z")

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Hello joe.real,

I have tested this issue and have verified that this is a bug with 4.11p1. Internally, this issue appear to be fixed.

I have entered bug for this issue. The bug number is UE-24773.

I do not have an ETA for when this will be fixed. Thank you very much for reporting this issue to us.

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<div class="post-metadata">

**Author:** ![anonymous\_user\_cc69b907](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_cc69b907](https://forums.unrealengine.com/u/anonymous_user_cc69b907)\
**Post date:** [January 14, 2016, 6:35pm UTC](https://forums.unrealengine.com/t/4-11p1-tessellated-materials-dont-compile-or-render/342287/3 "2016-01-14T18:35:26Z")

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I have verified this is fixed as of the latest version of 4.11.