I'm trying to work with custom OBJ models for a block, but I cannot seem to get the model to render. There is absolutely no tutorials for doing this in 1.9, so I have to do a large amount of playing around by myself.

 

I have found that I no longer need (nor can use?) a TESR, and can simply just use a ICustomModelLoader and OBJModel.

 

I have this as my loadModel method:

    @Override
    public IModel loadModel(ResourceLocation modelLocation) throws Exception {
      OBJModel.MaterialLibrary materialLibrary = new OBJModel.MaterialLibrary();
      materialLibrary.parseMaterials(resourceManager, "textures/blocks/crystal_seelum_block.mtl",
          new ResourceLocation(AuroraProjectBase.modId + ":blocks"));
      return new OBJModel(materialLibrary,
          new ModelResourceLocation(AuroraProjectBase.modId + ":block/crystal_seelum_block.obj"));
    }

 

After cleaning all the lines that upset the parser from the .mtl, it appears to load without errors, but the block is invisible in-game. What am I missing here?

I'm not sure exactly what your issue is, but you shouldn't need to write your own loader since Forge already has one. Just call

OBJLoader#addDomain

with your resource domain (mod ID) and Forge will load an OBJ model from anywhere you'd normally specify a JSON model.