Chams: use the loaded VGUI whites for flat and additive

models/debug/debugwhite is EP2-only and additivevertexcolorvertexalpha is not
loadable in the base game. Preload vgui/white for Flat and vgui/white_additive
for Additive; the other debug styles were already found. The viewmodel keeps
the solid model shader.

2 files changed, 10 insertions, 8 deletions

diff --git a/CONTEXT.md b/CONTEXT.md
index 72559ac..e323588 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -296,12 +296,14 @@ vocabulary / decisions.
   vars (IMaterialVar slot 11, SetVecValue 3-float slot 11), because some forced
   materials ignore ColorModulate. The shared material's flag and colour are
   restored to (false, white) after the draw.
-- The base game does not have the other debug VMTs resident and `FindMaterial`
-  does not make them available reliably, so all styles use the resident
-  `debug/debugtranslucentsinglecolor` and differ by material flags:
-  0 Flat (`FLAT`), 1 Wireframe (`WIREFRAME`), 2 Additive (`ADDITIVE`),
-  3 Solid (none), 4 White (colour forced to white), 5 Fullbright
-  (`FLAT|SELFILLUM`). Flags are reset after the draw.
+- The base game does not mount `models/debug/debugwhite` (EP2-only) or
+  `debug/additivevertexcolorvertexalpha`; the style material is preloaded from
+  `outer_draw` (throttled) and cached. Styles: 0 Flat (`vgui/white`),
+  1 Wireframe (`debug/debugwireframe`), 2 Additive (`vgui/white_additive`),
+  3 Solid (`debug/debugtranslucentsinglecolor`), 4 White
+  (`debug/debugtranslucentvertexcolor`), 5 Fullbright
+  (`debug/debugmrmfullbright2`). A missing style falls back to the solid one;
+  the render hook never calls FindMaterial itself.
 - `Viewmodel (hands/weapon)` applies the override to entities whose class
   contains `viewmodel` or whose model path is `.../v_...`. Viewmodels always
   use the solid style (no style flags) with the selected colour; VGUI/white
diff --git a/src/studio.cpp b/src/studio.cpp
index 44d1bb4..f815c16 100644
--- a/src/studio.cpp
+++ b/src/studio.cpp
@@ -204,11 +204,11 @@ void *viewmodel_material();
 const char *chams_material_name(int idx) {
   switch (idx) {
   case 1: return "debug/debugwireframe";
-  case 2: return "debug/additivevertexcolorvertexalpha";
+  case 2: return "vgui/white_additive";
   case 3: return "debug/debugtranslucentsinglecolor";
   case 4: return "debug/debugtranslucentvertexcolor";
   case 5: return "debug/debugmrmfullbright2";
-  default: return "models/debug/debugwhite";
+  default: return "vgui/white"; // models/debug/debugwhite is EP2-only
   }
 }