# Vray light problem

**URL:** <https://forums.chaos.com/t/vray-light-problem/18193>\
**Category:** General\
**Created:** [May 22, 2008, 3:43pm UTC](https://forums.chaos.com/t/vray-light-problem/18193 "2008-05-22T15:43:45Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![baw](https://avatars.discourse-cdn.com/v4/letter/b/41988e/32.png) [@baw](https://forums.chaos.com/u/baw)\
**Post date:** [May 22, 2008, 3:43pm UTC](https://forums.chaos.com/t/vray-light-problem/18193/1 "2008-05-22T15:43:45Z")

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I’m using a VRAY light set to Plane to simulate a 2x4 ceiling light. When its renders the light is outlined in a black pixelated line. why is the line showing up?

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**Author:** ![rivoli](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/rivoli/32/44395_2.png) [@rivoli](https://forums.chaos.com/u/rivoli)\
**Post date:** [May 22, 2008, 4:02pm UTC](https://forums.chaos.com/t/vray-light-problem/18193/2 "2008-05-22T16:02:13Z")

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if you are using a sharpening filter such as catmull or mitchell, that it’s likely to be the cause. you may want to switch to a non sharpening one, or check clamp output and subpixel mapping, or turning off filtering altogether.

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**Author:** ![baw](https://avatars.discourse-cdn.com/v4/letter/b/41988e/32.png) [@baw](https://forums.chaos.com/u/baw)\
**Post date:** [May 22, 2008, 4:20pm UTC](https://forums.chaos.com/t/vray-light-problem/18193/3 "2008-05-22T16:20:40Z")

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subpixel fixed it.

Thanks!