# VRay Light Directional problems in update 3 **URL:** \ **Category:** Issues\ **Created:** [November 20, 2019, 6:56pm UTC](https://forums.chaos.com/t/vray-light-directional-problems-in-update-3/96370 "2019-11-20T18:56:03Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Jiri.Matys](https://avatars.discourse-cdn.com/v4/letter/j/f14d63/32.png) [@Jiri.Matys](https://forums.chaos.com/u/Jiri.Matys)\ **Post date:** [November 20, 2019, 6:56pm UTC](https://forums.chaos.com/t/vray-light-directional-problems-in-update-3/96370/1 "2019-11-20T18:56:03Z")
Hi, in new scene I found a problem and I dont think this happened in update 2. When I put higher directional value in light, this light turn to black in reflections and refractions. ![.jpg.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/5/8/58325c8f913e29188d5a6f09ea5f88bbc22beba3.jpeg) ---
**Author:** ![Ymauchi](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/ymauchi/32/271368_2.png) [@Ymauchi](https://forums.chaos.com/u/Ymauchi)\ **Post date:** [November 21, 2019, 4:36am UTC](https://forums.chaos.com/t/vray-light-directional-problems-in-update-3/96370/2 "2019-11-21T04:36:51Z")
Perhaps it is the nature of Directional Light. [https://forums.chaosgroup.com/forum/…622#post579622](https://forums.chaosgroup.com/forum/v-ray-for-3ds-max-forums/v-ray-for-3ds-max-problems/49387-turning-on-directional-light-option-in-vray-light-makes-the-light-invisible-in-render?p=579622#post579622) [https://www.facebook.com/vladimir.ko…0952442534808/](https://www.facebook.com/vladimir.koylazov.9/videos/180952442534808/) ---
**Author:** ![Jiri.Matys](https://avatars.discourse-cdn.com/v4/letter/j/f14d63/32.png) [@Jiri.Matys](https://forums.chaos.com/u/Jiri.Matys)\ **Post date:** [November 21, 2019, 7:33am UTC](https://forums.chaos.com/t/vray-light-directional-problems-in-update-3/96370/3 "2019-11-21T07:33:29Z")
I think this is little bit weird and it turns black only in reflections and refractions, lights visible to camera directly is not affected and its white. ---
**Author:** ![matanov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/matanov/32/21656_2.png) [@matanov](https://forums.chaos.com/u/matanov)\ **Post date:** [November 21, 2019, 9:03am UTC](https://forums.chaos.com/t/vray-light-directional-problems-in-update-3/96370/4 "2019-11-21T09:03:15Z")
It’s not from Update 3. It’s a common behavior along all renderers. Unfortunately you’ll have to fake it for now. > **[corona lights with directionality going black when seen through refractive glass](https://forums.chaos.com/index.php?topic=25695.msg153727)** > > Alternatively use the Rayswitch Material and skip having two objects. (Corona light rectangle is the same as a plane with light material, when the plane has only one face) For GI have the Light material with directionality and for everything else... ---
**Author:** ![\_Lele](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/_lele/32/49986_2.png) [@\_Lele](https://forums.chaos.com/u/_Lele)\ **Post date:** [December 2, 2019, 9:06am UTC](https://forums.chaos.com/t/vray-light-directional-problems-in-update-3/96370/5 "2019-12-02T09:06:32Z")
> [@Jiri.Matys](#): > > I think this is little bit weird and it turns black only in reflections and refractions, lights visible to camera directly is not affected and its white. The view direction changes between the direct PoV and that of the reflection, so i don’t see it as being weird at all: you won’t be able to see those “photons” only when a certain angle is passed, however that may happen. ---
**Author:** ![Jiri.Matys](https://avatars.discourse-cdn.com/v4/letter/j/f14d63/32.png) [@Jiri.Matys](https://forums.chaos.com/u/Jiri.Matys)\ **Post date:** [December 5, 2019, 9:52am UTC](https://forums.chaos.com/t/vray-light-directional-problems-in-update-3/96370/6 "2019-12-05T09:52:30Z")
Ok, you are right, that make sense. Its strange I never saw this previously before update 3 but if its there all the time, then ok 🙂 ---
**Author:** ![\_Lele](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/_lele/32/49986_2.png) [@\_Lele](https://forums.chaos.com/u/_Lele)\ **Post date:** [December 5, 2019, 10:17am UTC](https://forums.chaos.com/t/vray-light-directional-problems-in-update-3/96370/7 "2019-12-05T10:17:20Z")
Belittling the real physics, think of it as a Laser, where the photons’ directions are coherent (in the case of a continuous laser beam, one says they are “spatially coherent”) and where, without a medium to scatter it, you wouldn’t see it unless you were \*exactly\* in the line of fire. The higher the directionality parameter in the V-Ray lights, the more “spatially coherent” the emission becomes, and so the behaviour becomes more similar to a laser beam. The “fix” is going to be a cheat, in fact, albeit a useful one. Alternatively, you could add a very thick fog to your scene! (kidding! ^^).