Support for `.mtl` Files with Textures

Increasing access

This enhancement would make it easier for people to use pre-made 3D models within their p5.js projects. It would broaden the creative possibilities for artists and designers by enabling more detailed and textured 3D models within p5.js projects.

Most appropriate sub-area of p5.js?

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

Feature enhancement details

Since version 1.9.2, p5.js supports .mtl files, but only for vertex colors (see processing/p5.js#6710).

This request aims to extend that support to include textures loaded by an .mtl file. Implementing this feature would involve creating a new data structure capable of handling both 3D models and their associated textures, potentially multiple per model.

Example sketch with a single texture: https://aijs.io/editor?user=sableraph&project=multiTextureMaterial_test

Start by reviewing the existing .mtl support described in processing/p5.js#6710 and the linked multiTextureMaterial_test example. Clarify how textures associated with .mtl materials should be represented alongside 3D models, including multiple textures per model. Done means .mtl files load their textures correctly in p5.js WebGL sketches.