humbletim

Perceptual Physics: The Case for Biased Decimation

A Post-Mortem on the "Goldilocks Hull" Protocol and Visceral Interoperability

Status: Archived / Theoretical

Date: January 2, 2026

Author: humbletim (with Gemini)

Introduction

This document provides a comprehensive mapping between the inputs of Blender's Principled BSDF shader node and the properties of Three.js's MeshPhysicalMaterial. The goal is to define a "universal dialect"—an intermediate, lossless data representation—that can store the full artistic intent from Blender and translate it faithfully for rendering in Three.js.

This mapping considers Blender 3.2 with an eye towards 4.0+ compatibility and targets Three.js r160. It treats physically-based properties as a shared "universal truth" between the two systems, while acknowledging and providing strategies for Blender-specific nuances. It uses the logic of Blender's glTF 2.0 exporter as a reference for specific PBR value translations, but does not adopt its lossy, delivery-oriented structure.

Core Mapping Table

The following table breaks down each relevant Blender property, suggests a key for your universal representation, identifies the corresponding Three.js property, and explains the tr

background (Scene)

 color

fog (Scene)

 type, color, near, far, density

Keybase proof

I hereby claim:

I am humbletim on github.
I am htio (https://keybase.io/htio) on keybase.
I have a public key ASAavTyTo5Al-oomVMaBaSnjLSLM0lIQ22LyD-sHkC_17go

To claim this, I am signing this object:

	// quick and dirty ppng.io signaling for p2p webrtc data channel -- 2024.09.08 humbletim
	// usage -- one side specifies 'left', the other 'right'; both sides specify the same key
	// dc = await QuickieDataChannel('left' /* \| 'right' */, 'test')
	// dc.send('hi');
	//
	// browser test page: https://gist.githack.com/humbletim/57f42977c939b81b0338b95a71c7a3c6/raw/index.html

	async function QuickieDataChannel(side, key) {
	const prefix = `https://ppng.io/humbletim-test-${key}`;
	const pc = new RTCPeerConnection({iceServers:[{urls:'stun:stun.l.google.com:19302'}]});

	// multicontext test script

	var script = typeof Script === 'object' ? Script : { type: typeof window === 'object' ? 'browser' : 'unknown' };
	var api = typeof KasenAPIExample === 'object' ? KasenAPIExample : {};
	var details = {
	type: script.type + '',
	api: api + '',
	now: api.now && api.now() + '',
	};

	<?php

	function createLead($accessToken, array $lead)
	{
	$method = 'post';
	$absUrl = 'https://api.getbase.com/v2/leads';
	$headers = array(
	'User-Agent: BaseCRM/PHP Sample',
	'Authorization: Bearer ' . $accessToken,
	'Accept: application/json',

	// test Client script to compare Model Overlay vs. Model Entity behavior for attached child Overlays
	// humbletim @ 2017.06.23

	var overlayProps = {
	url: MyAvatar.skeletonModelURL,
	position: Vec3.sum(Quat.getForward(MyAvatar.orientation), MyAvatar.position),
	scale: 1,
	};
	var ids = {
	overlays: [

	(function(){
	var teleport;
	var portalDestination;
	var animationURL;
	var position;

	function playSound(entityID) {
	print("playing teleport sound");
	if (teleport.downloaded) {
	if(!position) {

	(function() {
	var TROMBONE_URL = "https://s3.amazonaws.com/hifi-public/tony/audio/sad-trombone.wav";
	return {
	_resource: SoundCache.prefetch(TROMBONE_URL),
	_sound: undefined,
	_onStateChanged: function() {
	var resource = this._resource;
	if (resource.state === Resource.State.FINISHED) {
	resource.stateChanged.disconnect(this, '_onStateChanged');
	this._sound = SoundCache.getSound(TROMBONE_URL);