Texture in onLoadObservable; Doesn't work in ShaderMaterail

I wanted to load in a texture then send it to a shader with shaderMat.setTexture('texture', tx), but I encountered a problem. PS I am just getting started with shaders:

let texture = new BABYLON.Texture("https://i.imgur.com/M5VKiE7.png", scene);
texture.onLoadObservable.addOnce((tx) => {
        console.log(tx === texture); // true
        cube.material.setTexture("texture", tx);

But when I try it this way it passes. Why?

let texture = new BABYLON.Texture("https://i.imgur.com/M5VKiE7.png", scene);
cube.material.setTexture("texture", texture);

A link to the CYOS shader I wrote, link.

And here is a link to the playground, link. Or is it a problem with my shader? Any help would be very appreciated.

first you use a reserved keyword texture for your sampler name and did not declare it in the samplers list: https://playground.babylonjs.com/#2YJJIA#6

and if you fix that, then it works : https://playground.babylonjs.com/#2YJJIA#7

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In CYOS, the time uniform is automatically updated. But in the playground it does not. Is there something I am missing.

So it is smthg you need to handle on your side. Time is not automagically managed in shaderMaterial.

Here’s how you can handle your time parameter with a ShaderMaterial:


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So the time uniform is not automatically updated by BabylonJS under the hood? And what is the onBind observable? Can you explain what you have done? Thanks in advance

No, there’s no automatic time uniform, you have to handle it yourself.

onBind is called each time the material has to be bound to render a mesh, so it’s the right time to set the new value of the time parameter.

This doc may help: Shaders | Babylon.js Documentation

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I will try to figure it out for more. Keep sharing such informative post keep suggesting such post.

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