Unity Webgl Issues and Solutions

During my extensive interaction with unity WebGL, I found different things that are difficult to handle in unity WebGL or Unity Webgl has some serious limitations (But nevertheless I have managed to stream large 3D area in unity WebGL with asset bundles). I have made this post in order to show you Unity3D WebGL issues sheet and if you are interested to see what technologies or toolchain Unity WebGL using behind the Scene then check this post. So, without a particular order here is the list of unity webgl limitations with relevant references for your further research. 

Learn More: Unity WebGl Conversion Guide- Steps to Consider When Moved To WebGL

1. You cannot use Threads in unity WebGL. Here is the error that you will get when thread try to start:
SystemException: Thread creation failed.
UnityLoader.js:4   at System.Threading.Thread.StartInternal (System.Security.Principal.IPrincipal principal, System.Threading.StackCrawlMark& stackMark) [0x00000] in <00000000000000000000000000000000>:0
GameDev Question
Unity Forum
Unity Webgl Doc
Update: Unity claim that in Version 2019.1.0 they have added multiple Multithreading support but it was not working according to my test and now I also find this that there was bug with the problem which has fixed in Unity 2020.1.0 and Unity 2019.4.7 (untested)

2. If you are continuously pressing any keyboard input key and meanwhile you lost focus to WebGL canvas in the browser, the input will still work even after releasing the key. The situation may get worst in the Edge browser.
Ref:
SE Question
Maybe resolved in Unity 2019.3.0 but I have tested and still the same problem is happening.

Unity Tips and Tricks (Unity Shader Tips and Tricks) Part V

In this post, we gather different tips and tricks related to Unity Shaders.

Unity Shader Tips and Tricks

Wanna add cool transparent VR hands to your game but can't deal with the z-issues transparency brings?

The workaround: add a depth only pass to your shader:

Pass
{
ZWrite On
ColorMask 0
}#unitytips #gamedev pic.twitter.com/BwnnFPAf4u

— Matheus Lessa (@ahvamolessa) November 25, 2019

Using #shaders to make this dimensional portal 🌀🌟

Made in collaboration with @_khymeia_. Also big thanks to @enemyhideout for some of the math (https://t.co/iYantAsSNY).#unityTips #gamedev #shader #madewithunity #unity3D #indiegame #gameart pic.twitter.com/0IfHLFYYmG

— Couch Game Crafters (@CouchGameCraft) April 8, 2019

The second part of the geometry grass shader is now publicly out!🌿

Enhance your grass with lighting, shadows and translucency while making it extra lush with some additional tessellation!

🔗: https://t.co/W8jJ31lIav

Happy grass-making!#gamedev #madewithunity #unitytips pic.twitter.com/Gg7Cyhnm10

— Harry 💬 (@HarryAlisavakis) December 3, 2019

From Slime Rancher to Astroneer, many games add glittery reflections when rendering sand. ✨

If you want to recreate such a cool effect in @unity3d, have a look at this #gamedev tutorial about Journey's sand shader! 🏜️

👇👇👇https://t.co/vdX5UFxuCY#madewithunity #unitytips pic.twitter.com/EdgxpNf1CN

— Alan Zucconi (@AlanZucconi) January 8, 2020

I added a script to strip out about 90% of built-in shader variants in #unity that we weren't using based on this article https://t.co/jnehSbejZv

Saved nearly 3MB and everything builds sooooooo much quicker#gamedev #unitytips pic.twitter.com/YgSrUxi0yJ

— Damian Connolly (@divillysausages) January 2, 2020

#UnityTips You can create artificial fog for a low-spec project by fading out an object's alpha (this was created using Shader Graph) and using a blank skybox.

This obviously isn't a fits all solution but for this case it was simple and really quick to setup.#unity3d #gamedev pic.twitter.com/6dcbeDz85n

— Jack Tilling (@jacktilling_) January 6, 2020

The cel-shading shader tutorial is now publicly out for everyone!

While this shader may not be a solution for all your needs, it has some neat and useful features to get you started!

🔗: https://t.co/zoWGniu2lB

Zelda model by @artstoff #gamedev #madewithunity #unitytips pic.twitter.com/CdKNHqCvR8

— Harry 💬 (@HarryAlisavakis) January 7, 2020

I finally managed to make a new shader tutorial. It's about maths.
With inverse lerp and remap you can control gradients in neat ways!https://t.co/HIFwx8iTff#gamedev #unitytips pic.twitter.com/oGKqwgWARu

— ✨Ronja✨ (@totallyRonja) January 9, 2020

Sample depth, normals and color for a neat outline effect. Tutorial here https://t.co/kidCqAt7Mg to create this in URP with shader graph! #unity3d #unitytips 💡 pic.twitter.com/p12vfkmpGC

— Alexander Ameye (@alexanderameye) January 7, 2020

The first part of the grass shader tutorial is publicly out! 🌿

Check it out to see how you can harness the power of geometry shaders to make some cool-looking wind-swaying lush unlit grass!

🔗: https://t.co/nkiG0X3ieD#gamedev #madewithunity #unitytips pic.twitter.com/egyYKaEXbU

— Harry 💬 (@HarryAlisavakis) October 29, 2019

You can now choose where to learn about Shaders in @unity3d !
My video and article are both available now, have fun!

🎥Watch: https://t.co/uuUiCfDQGc

📝Read: https://t.co/UN8oW1H9Cp#gamedev #indiedev #unitytips #unity3d pic.twitter.com/jM1xfk9Ak6

— Febucci (@febucci) November 5, 2019

See Also:

• Unity Tips and Tricks Part I
• Unity Tips and Tricks (Scene Tips and Tricks) Part II
• Unity Tips and Tricks (Unity Coding Tips and Tricks) Part III
• Unity Tips and Tricks (Unity Editor, Performance Optimzation and Build Tips) Part IV

Game Pause on error in Unity3d

For debugging purposes, you may require to pause the game on an error so that you can inspect the game situation. For this reason, you can follow these steps:

1. Write an error log in block of the code

    Debug.LogError("Exception occured");

And before running the editor open console and hit Error Pause in the console log.

The game will pause as any error occurred in the console.