LOD Your Lights - Performance Optimization | Unity Tutorial

[@dreamisover9813]

I really like the topics covered on this channel, something not everyone talks about and still very useful!

[@LlamAcademy]

Happy to hear that ❤️

[@arctiformgames]

Wow, what a great idea! I had never even considered LODs for lights and will most definitely be utilizing this, thank you!

[@LlamAcademy]

I hope you get a big performance uplift from implementing it!

[@JasonWelch]

I often don't really need to know the implementation details, but rather to simply answer my question "are other people doing this?", but I probably would have spent a ton of time manually tweaking every light property if I hadn't watched this. I wound up just using a timer within an update loop myself. The extra thing I added was a scriptable object for default settings so that you don't need to prefab a bunch of lights or manually copy the settings for each light.

[@LlamAcademy]

Those are some great enhancements to make this more accessible and easy to use/scale! 💪

[@shahar.mmoshin8694]

Your one of the best KZbinrs for unity out there, keep up the good work.

[@LlamAcademy]

🙏thank you! I appreciate that

[@stylie473joker5]

You never disappoint thx i never thought this was a thing

[@MASATOSHIP_Official]

Oh...WOW! Awesome tutorial.

[@AletseDev]

Super useful thank you ❤️

[@qaz86310038]

Thanks for this tutorial, It will be very helpful 👍

[@LlamAcademy]

You're welcome 😊

[@LiamLucca]

the ceo of optimization

[@LlamAcademy]

😍 I like that

[@isjesse1]

you may have saved my game

[@lando6583]

I always wondered what the best way to do non-Update based distance checking!

[@snorQz]

Amazing :DD THXXX

[@connorpayne2671]

You were talking about improving performance at 0:18 and my WiFi was being really slow. I thought you put lag in the video intentionally 😅😅

[@LlamAcademy]

😁

[@connorpayne2671]

@@LlamAcademy I'm definitely going to try this when I work on optimization. I'm working on a game called Bible Dungeon and there are a lot of torches and fire pedestals in the game. So many that the torches cause the game to lag. I get 30 to 40 frames per seconds on my Ryzen 7 5700g, RX6650XT desktop and I7, RTX 3050Ti laptop. I disabled all the torches and fire pits and it shot up to 100 frames or more on my desktop

[@gerarddiazvidal5121]

shadowmasking the lights should avoid the shadow popping, would that have a noticeable impact on performance?

[@sanatdeveloper]

Can you please update Asset in asset store 🙏

[@LlamAcademy]

Is there something wrong with the version on the asset store?

[@Abdullah3864]

hello i have 1 directional light how can i implement this to only 1 directional light

[@LlamAcademy]

For a directional light you are not moving meaningfully closer or farther away. I think you can get a similar effect via shadow cascades in the lighting settings

[@galaxyacetype0]

Couldn’t seem to get this to work on 2021.3 using URP. No errors the shadows come on and off but the resolution stays the same.

[@LlamAcademy]

Hmm... I'm using 2021.2 or .3 on this one. If you check it out from GitHub does it work for you?

[@domowomo8032]

@@LlamAcademy Hey I've got the same exact problem, in URP it seems you can't change the Light.shadowResolution but in SRP you can, do you know any workarounds?

[@mediaexposed6256]

thnks

[@DrakeKazmierczak]

Does this work with URP?

[@LlamAcademy]

Yes

[@DrakeKazmierczak]

@@LlamAcademythis is fantastic, thank you for creating it! I was wondering if there's a way to automatically turn off the lights when the player moves farther away from them?

[@mad616]

Unreal has nanite and unity still bound to LoDs :/

[@LlamAcademy]

🙂 unfortunately Nanite does not help this particular problem. I’m not sure if Unreal has this built in, but if you spawn 50 or more real-time lights in a smallish area you’ll likely see a similar problem to what this is helping solve (high real-time lighting compute cost)

[@johnsojourn9114]

It works but there is no difference in performance.

[@LlamAcademy]

Well, depends on your scene. As I mentioned in the video, your mileage will vary. In this particular example we shaved off a significant chunk of rendering time. If you’ve got a handful of real-time lights and simple scene geometry, probably won’t see much improvement. If you’ve got dozens or hundreds of real-time lights, you’ll definitely see gains

[@johnsojourn9114]

@@LlamAcademy Ah okay. I have a scene with thousands of blocks with rigidbodies and a small number of lights. So lot's of shadows all being calculated but not so many lights. I'm trying to optimize performance through shadows and lighting but hard or soft doesn't really seem to matter. I know this has been huge when dealing with mobile platforms but on PC with URP there seems to be very little difference between soft or hard or low or high quality, it kinda blows my mind because this doesn't fit with what I've learned over the years. But I guess the performance gains are not going to be found on this side using such a simple setup.

[@johnsojourn9114]

@@LlamAcademy By the way: a cool idea for a tutorial in the same vein as this one is fading out lamps and turning them off based on proximity to the player. Like what is done in this video: kzbin.info/www/bejne/r2WpdIFvaZ1sl9k

[@MuchCow9000]

New Unity lighting sucks

[@CrashChan666]

Hello ,I'm interested in if this will work with HDRP too. There are no Soft Hard options, I realized that when I attached the script. In HDRP, ShadowMapResolution handles the shadow resolution, right? But I'm not sure Volume handling whole shadow resolution. If it could handle using LODLight, I could manage lighting more easily. I used SetShadowResolution, but this doesnt work. public class LODAdjustment { public float MinSquareDistance; public float MaxSquareDistance; //public ShadowMapResolutions ShadowResolutions; public HDShadowFilteringQuality ShadowResolution; //public LightShadows LightShadows; //public HDAdditionalLightData LightShadows; public Color DebugColor; } private IEnumerator AdjustLODQuality() { //To Avoid Big Spikes float delay = UpdateDelay + UpdateDelay == 0 ? UpdateDelay : UnityEngine.Random.value / 20f; WaitForSeconds wait = new(delay); while (true) { if (LightLODCamera.Instance == null) { yield return wait; continue; } if (LightShouldBeOn) { float squareDistanceFromCamera = Vector3.SqrMagnitude( LightLODCamera.Instance.transform.position - transform.position); for (int i = 0; i < LODLevels.Count; i++) { if (i == LODLevels.Count - 1 || (squareDistanceFromCamera > LODLevels[i].MinSquareDistance && squareDistanceFromCamera