# PVRTexTool incorrect etc1 cubemap generation

**URL:** <https://forums.imgtec.com/t/pvrtextool-incorrect-etc1-cubemap-generation/2346>\
**Category:** PowerVR Insider\
**Tags:** pvrtextool\
**Created:** [August 11, 2015, 1:21am UTC](https://forums.imgtec.com/t/pvrtextool-incorrect-etc1-cubemap-generation/2346 "2015-08-11T01:21:50Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sova](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@sova](https://forums.imgtec.com/u/sova)\
**Post date:** [August 11, 2015, 1:21am UTC](https://forums.imgtec.com/t/pvrtextool-incorrect-etc1-cubemap-generation/2346/1 "2015-08-11T01:21:50Z")

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PVRTexTool 4.1.6 (SDK build 3.5@3523712)  
(latest)

Hi!  
PVRTexTool has an error in the cubemaps creation.  
Left image - rgb cubemap reflection (glGenerateMipmap(GL\_TEXTURE\_CUBE\_MAP);).  
Right image - etc1 cubemap reflection with mipmaps generated by PVRTexTool  
There are artifacts (thin lines).

Please fix.

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**Author:** ![PaulLy](https://avatars.discourse-cdn.com/v4/letter/p/958977/32.png) [@PaulLy](https://forums.imgtec.com/u/PaulLy)\
**Post date:** [August 12, 2015, 9:29am UTC](https://forums.imgtec.com/t/pvrtextool-incorrect-etc1-cubemap-generation/2346/2 "2015-08-12T09:29:29Z")

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Can you confirm that in your rendering code the wrap modes are set to GL\_CLAMP\_TO\_EDGE?

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<div class="post-metadata">

**Author:** ![sova](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@sova](https://forums.imgtec.com/u/sova)\
**Post date:** [August 12, 2015, 11:58am UTC](https://forums.imgtec.com/t/pvrtextool-incorrect-etc1-cubemap-generation/2346/3 "2015-08-12T11:58:13Z")

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> [@](#):
>
> Can you confirm that in your rendering code the wrap modes are set to GL\_CLAMP\_TO\_EDGE?

Opps! Sorry!

GL\_CLAMP\_TO\_EDGE fixes the problem!