Pack Making Models Translucency - DonBruce64/MinecraftTransportSimulator GitHub Wiki

Normally, MTS renders all textures in the default solid render pass. This is a rendering pass where all entities render, and all faces are considered solid. The reason for this is that blending translucent textures takes precious GPU time, and if a model doesn't have anything translucent, such as a cow, then it's a waste of time to do any translucent blending operations. MTS follows this same principle, in that all models are, by default, rendered without blending.

However, if you wish to have translucent objects in your model, you can tell MTS about them and it will render those objects in a special blending pass. This is done by putting the word translucent in the name of objects on your model. When MTS sees those, it will send them to the special blending render to be blended with whatever texture they have. This can be used for things like tinted windows.