kvdml

I removed the world shader node of my object in Blender, v3d gltf size dropped to 946kb ‘(from 1.2Mb). xz-compression dropped it to 364 kb, which is not a huge difference with the xz-compression of the object with world-shader node (385 kb).
It would be nice if in future versions we could decide ourselves what mesh attrs could be optimized: the optimized mesh attr. version is comparable with a plain glb in filesize (696kb uncompressed, 219 kb with xz compression). Too bad it’s not compatible with v3d pbr shaders with maps.
Thanks for the info though, Alexander.

just did a quick test: the imported object does not get the pbr material assigned when it’s a standard glb. A v3d glb version works.
This was not a problem in version 4.2
Also, the Verge .glb is almost double the size in kb 1.2 mb for the Verge version, 680 kb for the standard glb.
After XZ compression, this goes to 385kb vs 184kb

fixed the errors, no change

For those with the same problem: it’s ONLY Chrome on MacOS that has this behavior. Probably their webgl metal implementation is not 100% yet, as even MS Edge doesn’t have this problem.
I fixed it like this (no puzzles, I code directly into the visual_logic.js) : since all our materials are swappable, we’ve made a second albedo map colorcorrected for Chrome

let userAgent = window.navigator.userAgent;
        let os = "Unknown OS";

        if (userAgent.indexOf("Win") != -1) os = "Windows";
        if (userAgent.indexOf("Mac") != -1) os = "MacOS";
        if (userAgent.indexOf("X11") != -1) os = "UNIX";
        if (userAgent.indexOf("Linux") != -1) os = "Linux";
        os = os.toLowerCase()
        // alert(os)

        var browser = (function (agent) {
            switch (true) {
                case agent.indexOf("edge") > -1: return "edge";
                case agent.indexOf("edg/") > -1: return "chromiumedge"; // Match also / to avoid matching for the older Edge
                case agent.indexOf("opr") > -1 && !!window.opr: return "opera";
                case agent.indexOf("chrome") > -1 && !!window.chrome: return "chrome";
                case agent.indexOf("trident") > -1: return "ie";
                case agent.indexOf("firefox") > -1: return "firefox";
                case agent.indexOf("safari") > -1: return "safari";
                default: return "other";
            }
        })(window.navigator.userAgent.toLowerCase());
        // alert(browser);

        var browserextention = ''
        if(os == 'macos' && browser=='chrome'){
            browserextention = '-chrome'
        }

Materialswapping then goes like this where applicable :

replaceTexture(
                "matFabric",
                "dummie_albedo_fabric.jpg",
                "assets/3d/maps/fabric_" + myFabric + "_albedo"+browserextention+".jpg",
                function () {}
            );

beta of the app is on https://umbrosa.staging.nanopixel3d.com/en

Thanks, that’s way more elegant

thanks, that explains a lot