Chams: working alpha via RenderView blend and a custom VMT

Testing on :99 showed the material $alpha path is a dead end: UnlitGeneric
takes translucency from the base texture/vertex alpha, and the debug materials
have neither. Follow Amalgam: apply alpha with IVRenderView::SetBlend
(VEngineRenderView014 slot 4) around the model draw, saving/restoring it.

To have something translucent to blend, write a tiny UnlitGeneric VMT with
$model 1 + $translucent 1 + a white base texture to
<game>/<mod>/materials/hl2hake/translucent.vmt (plus a custom/ copy). It is
written by a preload constructor so it exists before the material system scans
its search paths, then loaded once with FindMaterial. Styles 0/3/4/6 use it
when the colour alpha is below 255.

Also:
- Visible wireframe + through-wall: fill the visible silhouette first so the
  through-wall pass cannot show in the wireframe gaps, then draw a brightened
  contour. Style 6 is now "Solid + contour" (recolour + visible edges).
- find_modules builds local snapshots and publishes them under a mutex; the
  setup thread and the server retry could reset the shared vectors live and
  crash at startup.

Verified on :99: Solid + alpha 64 renders a see-through viewmodel, Solid +
contour shows a blue fill with bright blue contours, Additive is a translucent
coloured glow and Fullbright is a white additive glow.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gui.cpp b/src/gui.cpp
index 89888da..fe82762 100644
--- a/src/gui.cpp
+++ b/src/gui.cpp
@@ -459,7 +459,7 @@ static void build_cards() {
                        "Per-relationship model colours.", true);
   static const char *const chams_mat_names[] = {
       "Flat", "Wireframe", "Additive glow", "Solid", "White", "Fullbright",
-      "Glow outline"};
+      "Solid + contour"};
   auto add_chams_group = [&](const char *title, ChamsGroup &g) {
     add_section(chams, title);
     add_toggle(chams, "Visible", "Draw the normal-depth pass.",