Why channel-packed ORM textures render wrong in Unity and Unreal
Metallic looks flat gray, roughness looks inverted: here's why ORM channel packing reads differently in Unity, Unreal Engine 5, and Godot.
Optimization — 3D Modeling Articles
11 articles tagged optimization. Tutorials and workflow notes for getting 3D assets into Unity, Unreal Engine 5, Godot 4, and Blender.
Why your GLB won't launch in Android AR (Scene Viewer fix)
GLB models that render fine in Blender or three.js can still fail silently in Android's Scene Viewer AR mode — wrong URL type, wrong scale, or a parser edge case trip it up with no error message. Here's how to diagnose…
Why glTF exports silently drop your LOD levels
glTF 2.0 has no concept of LOD levels — export a Unity LOD Group or a multi-resolution mesh to GLB and only one survives. Why that happens, what MSFT_lod actually covers, and how Unity, Godot, and UE5 handle LODs…
Which engines actually support KTX2-compressed GLB textures
Unity, Godot and Unreal Engine 5 handle glTF's KHR_texture_basisu KTX2 extension very differently — here's which ones actually transcode compressed GLB textures and how to check before you ship.
Why Unreal Engine 5.7 skips Nanite on your GLB imports
Unreal Engine 5.7's Interchange pipeline only Nanite-converts meshes that clear a triangle threshold on import — here's where that setting lives, what actually clears it, and how to force Nanite onto smaller GLB meshes…
Godot's compatibility renderer silently kills your GPU particles
Godot's Compatibility renderer has no compute shader support, so GPUParticles2D and GPUParticles3D fail with zero error or warning. Here's why it happens, what Forward+ and Mobile do differently, and the CPUParticles…
Why Unity 6's GPU Resident Drawer ignores your imported GLB models
Unity 6's GPU Resident Drawer silently falls back to the old draw path when imported models trip one of five disqualifiers — no error, no warning. Here's how to spot which one and fix it before your next build.
Why Nanite makes imported foliage slower, not faster
Enabling Nanite on an imported foliage GLB can make it render slower than the non-Nanite mesh — masked leaf cards break the occlusion culling Nanite relies on. The exact Static Mesh Editor and material settings that…
Automate your 3D asset pipeline with a public catalog API
BitSoul's 1,051-model catalog is a queryable JSON API, not just a browsing grid: filter by poly count, license, and category by script, then catch the gotcha where unauthenticated requests silently return a preview…
Cut your demo's polygon count before Next Fest without Blender
How to reduce polygon count on marketplace GLB models directly in the browser, no Blender required, before Steam Next Fest's October deadlines. Covers 3D Studio's Poly Reduce workflow, real trim numbers, and the…
Apple killed usdzconvert — what still works for glTF to USDZ
Apple discontinued usdzconvert and delisted Reality Converter, so here's the current, working path for glTF-to-USDZ conversion — including which material extensions silently disappear and the zip-packaging bug that…