could you add support for custom named items into the resource pack part of the mod?

for example: if you have a carved pumpkin which adds a custom texture when renamed then only that item would give of light and not all carved pumpkins!

This is already possible with LambDynamicLights v3 and v4 format, the match part of item luminance files uses Vanilla item predicates, which means you can match against components, in this case the custom_name component.

Oh ok so it's my bad JSON knowledge that didn't get it to work. (I'm a beginner.) Thanks for the response.