Chams: fix the flat viewmodel, glow outline and fullbright styles

- Flat uses the solid model shader with the FLAT flag on the viewmodel;
  vgui/white does not draw skinned models and made the hands vanish.
- Glow outline draws its wireframe contour with ZNEARER and a brightened
  colour, so the solid base no longer hides the contour.
- Fullbright is now additive + self-illuminated with the colour lifted toward
  white, so it reads differently from Solid and Additive glow.

1 files changed, 10 insertions, 6 deletions

diff --git a/CONTEXT.md b/CONTEXT.md
index be526fc..f7fdecb 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -296,12 +296,16 @@ vocabulary / decisions.
   (IMaterialVar slot 11, SetVecValue 3-float slot 11) and `ColorModulate`
   (slot 28). Shared materials are restored after each draw.
 - Styles are built from the resident materials and material flags:
-  0 Flat (`vgui/white` with FLAT), 1 Wireframe (`debug/debugwireframe`),
-  2 Additive (`debug/debugtranslucentsinglecolor` + ADDITIVE), 3 Solid,
-  4 White (solid, colour forced white), 5 Fullbright (solid + FLAT|SELFILLUM),
-  6 Glow outline (solid plus a `debug/debugwireframe` contour pass).
-  `models/debug/debugwhite` is EP2-only and the old VGUI additive material is
-  invisible on NPCs; the styles no longer depend on them.
+  0 Flat (`vgui/white` with FLAT on NPCs; the solid model shader with FLAT on
+  the viewmodel, because VGUI materials do not draw skinned models),
+  1 Wireframe (`debug/debugwireframe`), 2 Additive
+  (`debug/debugtranslucentsinglecolor` + ADDITIVE), 3 Solid, 4 White (solid,
+  colour forced white), 5 Fullbright (solid + ADDITIVE|SELFILLUM with the
+  colour lifted toward white), 6 Glow outline (solid plus a
+  `debug/debugwireframe` contour pass drawn with ZNEARER (1 << 10) and a
+  brightened colour so the base cannot bury it). `models/debug/debugwhite` is
+  EP2-only and the old VGUI additive material is invisible on NPCs; the styles
+  no longer depend on them.
 - Style materials are preloaded from `outer_draw` (throttled) and cached; the
   render hook never calls FindMaterial itself. A missing style uses solid.
 - Feature is off by default. Config sections: `[chams]` (active/bind),