"[2d Lights] We're using a perspective camera, any way to get 2D lights to work properly?" (834363)

Unity Engine
21

Hello. Is there any progress on the Shadow Caster issue? This is preventing us from using this feature and create problems with a gameplay feature we have.

Thanks.

1 Like
22

Itā€™s getting kinda frustrating now :frowning:

23

Hello, I was waiting for the fix too and I finally fixed it myself. Hereā€™s how:

  1. URP package needs to be embedded in your project so you can modify it. To do this, copy the package from the package folder into your projectā€™s Packages folder.
    https://discussions.unity.com/t/743806

  2. In the embedded package find the file LightingUtility.hlsl

  3. Modify the line 68

output.ShadowUV = ComputeNormalizedDeviceCoordinate(output.PositionCS.xyz);

by

output.ShadowUV = ComputeNormalizedDeviceCoordinate(output.PositionCS.xyz / output.PositionCS.w);

The division by .w will correctly render your shadow UV with a Perspective Camera. Otherwise, it will only work with an Orthographic Camera.

7319377--888250--EA837CD2-1031-4495-B09B-8C62FD71C752.png

24

Thanks for this! Much appreciated!

25

I just ran into the problem where 2D lights with a perspective camera stop working as well. The problem specifically occurred when upgrading 2021.1.13f1 to 2021.1.14f1; upgrading from 2021.1.13f1 directly to 2021.1.15f1 has the same result.

What Iā€™m seeing is that 2D lights in the scene view render correctly. Unfortunately, 2D lights in the game view, or in a player build do not renderer correctly.

@Chris_Chu can you have a look at case 1353065? I filed a bug report detailing what I observed. Whatever change to URPā€™s lighting from version 2021.1.13f1 (2D lights work fine) to 2021.1.14f1 is causing the problem to occur.

26

Iā€™m still seeing the same problem where 2D lights using a perspective camera stop working after upgrading 2021.1.13f1 directly to 2021.1.15f1, or directly to 2021.1.16f1.

Something changed between 2021.1.13f1 and 2021.1.14f1 that affected 2D lighting when using perspective cameras.

@Chris_Chu can you help track down this bug? If not, do you know of someone that would be able to work on this issue (detailed in cases 1353065 and 1354732).

27

Sorry, I must have missed seeing this thread earlier. The shadow caster in perspective mode was fixed in 2021.2 but had not been backported to 2021.1. It is now backported so it should be out when the next version of URP is released with the editor.

As @flapierrelds mentioned it needed a divide by w. A while back URP core APIā€™s changed which is what caused this breakage.

We are improving our automated test coverage to make sure we can catch things like this in the future.

Iā€™m not sure why perspective lighting would be currently broken. I will check out whatā€™s going on with this when I get your bugs.

1 Like
28

Any updates on this?

Having the sample problem here on Unity 2021.1.16f1. With perspective camera all lights look very funky, both in scene and in game view. Depending on camera position/rotation everything changes. But when I make my camera orthographic everything looks dandy in game view. And in scene view all looks fine when I click the 2D icon.

1 Like
29

Iā€™m sticking on 2021.1.11f for now. Updating past that breaks the 2D lights system. Weā€™re close to launch on steam and consolesā€¦ Sucks really. Maybe weā€™ll add shadows in a future update

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30

I received a reply to one of my bugs (case #1354732) on the issue of 2D lighting being broken when used with perspective cameras. The response was simply that is was a known issue: 1315645.

Just upgraded to 2021.1.18f1 to see if itā€™s been fixed, and it hasnā€™t.

1 Like
31

yup, having the same issue as @kayroice

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32

@Chris_Chu
Was forced to update to match nintendo switch software version and now Um running 2021.1.1.17f1 and its not working with perspectiveā€¦ All light are all over the place :S
Any news on a updates coming?
Cheers

3 Likes
33

Iā€™ve come back to this thread to say the exact same thing. Had to update to 2021.1.19f1. Lights are all over the place.

I donā€™t think I need to specify more, but can if needed.

I would absolutely love some good news about this as Iā€™m completely screwed as it stands. We need to push a build out on switch for the publisher ASAP.

Thanks

2 Likes
34

And to add to this, have the shadow casters been looked at at all? Last time I tried to use them they still had the GetComponent in the update method and performance dropped below playable rates.

35

I can see that itā€™s stated as fixed in 2021.2, however it would be wonderful to see it back ported to 2021.1.x

As 2021.2.x is still in preview, Iā€™m a little reluctant to use it for a game we plan to ship in a month or so

1 Like
36

The bug report for this issue, 1315645, canā€™t be voted on since thereā€™s a fix (2021.2.0a10), but you can comment on the issue. Not sure if that results in increased visibility, but itā€™s worth trying. I just commented asking for a fix in 2021.1.x, more voices wonā€™t hurt.

@Chris_Chu do you happen to know if thereā€™s an ETA for backporting the 2D perspective lighting fix from 2021.2.0a10 to 2021.1.x?

2 Likes
37

I will personally send a case of beer (or soft drink of your choice) to the person/team that back ports this to 2021.1.x

3 Likes
38

I need to do some other backports sometime this week. Iā€™ll take a look.

5 Likes
39

Do you like beer? :wink:

2 Likes
40

I also have to port to switchā€¦ If you update, pls Tag me and let me know how it went.
Becuase; if you update, it might not work with the NDI Interface/Switch Version. Right?
As far as I can tell, the Unity version and the Switch Version need to match?