[SOLVED] Error: Fragment shader texture image units count exceeds MAX_TEXTURE_IMAGE_UNITS(16)

Help & Support
1

Hi I’m making an online multiplayer game and I have it working on my Chromebook but when I try to run it on my desktop everything is the camera clear colour except UI.
Either that or sometimes it just crashes out right.
Is there any way I can make the versions match?

2

Update: I have found a few more details on the chromebook there are 0 errors while on desktop it says “Error: Fragment shader texture image units count exceeds MAX_TEXTURE_IMAGE_UNITS(16)” if anyone knows what that means please tell.

3

Hi @WilliamBoersma31,

That error means there are too many textures being passed to the GPU at the same time. This usually occurs when you have too many realtime lights. Try disabling a few of them and see if that improves anything.

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4

ok thanks for the feed back although I have 1 question. Why would the Chromebook be able to handle it when the Desktop has about 10 the specs?

5

I can’t say for sure. Different hardware and browsers can have different settings for what they allow to be passed to the GPU

6

Lowering the amount of lights fixed it is there any way I can have the lights only activate while withing a specific range?

7

Hey I’m making a game that has a big map and I need the lights to switch between details when within a radius I have this for the code https://playcanvas.com/editor/code/843141?tabs=59580428 but its not working does anyone know how to fix it?

8

Update: I got it working but it causes a massive lag spike especially when there are lots of lights. Is there any way to optimise it to help with lag?

9

Hi @WilliamBoersma31,

If you use more than 2-3 lights then that’s expected.

Consider using cluster lighting for that:

https://playcanvas.github.io/#/graphics/clustered-lighting

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10

With clustered lights, you can have many lights a lot cheaper with less / no spikes. Those spikes are caused by shaders having to recompile when you enable / disable lights.

But note that clustered lights are not fully featured yet, it’s a pre-release of the tech. But seems to work well for some projects already.

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11

Hey just wondering if i can have a little help implementing cluster lights

12

Sure. Lest start with details on what light set up you use / need please, to make sure clustered lights can help out here.

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13

I just need something like the basic cluster-lighting example

14

in that case just look at the example … and grab few relevant lines

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15

if you don’t need shadows nor cooking for omni and spot lights, set these to false as well - makes shaders smaller / faster

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16

How would I setup the first one I tried copying it into my project but it didn’t work

17

should I just copy the highlighted part?

18

yes - create a script, maybe call it clustered-lights.js, copy those lines to initialize function, and attach it to a root of your scene or something similar … so those lines execute just one time.

19

Thanks I got it working with no additional setup

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20

Update: The game now crashes when I change scenes. How do I fix that?
When it crashes it leaves this error " [playcanvas.dbg.js?version=1.49.1:22062]: Uncaught TypeError: Cannot read properties of undefined (reading ‘depthBuffer’)"