Image uniforms get reset after each draw using a shader

[nakednous]

Most appropriate sub-area of p5.js?

• [ ] Accessibility
• [ ] Color
• [ ] Core/Environment/Rendering
• [ ] Data
• [ ] DOM
• [ ] Events
• [ ] Image
• [ ] IO
• [ ] Math
• [ ] Typography
• [ ] Utilities
• [X] WebGL
• [ ] Build process
• [ ] Unit testing
• [ ] Internationalization
• [ ] Friendly errors
• [ ] Other (specify if possible)

p5.js version

1.6.0 onwards

Web browser and version

No response

Operating system

No response

Steps to reproduce this

I've implemented shadow mapping in p5.js v1.5.0 using p5.Graphics and the p5.treegl library. While this works seamlessly in v1.5.0, I'm facing challenges with versions from p5.js v1.6.0 onwards. I am planning to transition to using p5.Framebuffer once this issue is resolved.

Steps to Reproduce:

1. Run the shadow mapping implementation in p5.js v1.5.0 here.
2. Attempt the same using p5.js v1.9.3 here.

I've verified that the p5.treegl commands function identically in both versions. Notably, p5.js v1.6.0 introduced significant updates to shader-related features. I'm unsure if this issue qualifies as a bug or if I should report it or ask for help at the p5.js forum.

@davepagurek, could you possibly take a look and provide some guidance?