1 files changed, 7 insertions, 2 deletions

diff --git a/CONTEXT.md b/CONTEXT.md
index a490403..669c1fb 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -364,8 +364,13 @@ vocabulary / decisions.
   the INI). Not `sv_skyname`: that did not take effect at runtime in this
   build, so the skybox card now works on materials instead.
 - PNG is decoded with libpng16's simplified API (`dlopen`ed, no link
-  dependency); the RGBA pixels become an `ITexture` via
-  `IMaterialSystem::CreateTextureFromBits` (RGBA8888, one mip).
+  dependency). This build's `IMaterialSystem` interface ends at
+  `GetDisplayDeviceName` (the slots after it belong to `CMaterialSystem`
+  itself), so there is **no `CreateTextureFromBits`**. The pixels are uploaded
+  through `CreateProceduralTexture` (vtable 81) + an `ITextureRegenerator`
+  (`SetTextureRegenerator` 12, `Download` 13), which fills mip 0 through
+  `IVTFTexture::ImageData(frame,face,mip)` (39). `IVTFTexture`'s virtual
+  destructor occupies two slots, so Width=15, Height=16, RowSizeInBytes=19.
 - The texture is assigned with `IMaterialVar::SetTextureValue` to
   `$basetexture`, plus `$hdrbasetexture` / `$hdrcompressedtexture` when those
   vars exist, on every material in the `SkyBox textures` group or named