How to make a custom post-processing shader run at all times

[edgy charm]

I think the most likely issues are:

• The GLSL code
• The "outdated texture pack" message
• test.json
• Potentially Terralith is interfering, but it doesn't have a resource pack, at least not that I can tell

[low eagle]

You can't make post processing shaders run all time. The most used post processing shader is transparency which only runs when the player puts it graphic settings to fabulous