The shader chunk challenge

[yaustar]

The shader chunk was never an official API and been one of those things that kept being kicked down the road till more recently.

We are currently in the process of getting materials into a much more stable state and also prepare on integrating a node graph shader editor to help with this type of thing.

TLDR at the moment, the chunk system is where each chunk represents some behaviour on the standard material. eg diffuse chunk for the diffuse channel, etc.

You can override each chunk from the standard behaviour to use your own bespoke behaviour.

Here’s a thread with an example of overriding the diffuse and opacity chunk

How can I make the custom shader stop?

Here’s an example of it being converted to Standard Material chunks: https://playcanvas.com/project/990841/overview/custom-shader-chunks I’ve added sliders for ‘uTime’ so I can debug it more easily. The material opacity is now independent from the effect so you can fade the whole thing in and out

And one by Leonidas too

Working with shader chunks

This comes from a discord discussion where a user wanted to convert a custom shader to use shader chunks. Since a lot useful and undocumented details where shared, I’m compiling a summary of the discussion. At the end the user was kind enough to share the final project. how hard is it to transfer this shader tutorial Custom Shaders | Learn PlayCanvas to this way of writing shaders? Warp a Sprite with GLSL | Learn PlayCanvas Not that hard, from what I see you don’t need to override any vertex…