Full-canvas 1080p viewscreen, compact MFDs in the corners

Playtest direction on the canvas layout: all five MFDs at the compact
320x240 glass size - upper pair pushed to the top corners, score glass
top-center, lower pair in the bottom corners, map bottom-center - and
the viewscreen now fills the entire 1920x1080 canvas. Launched with
-res 1920 1080 the 3D renders native 1:1 (the 2007 D3D9 path takes the
1080p backbuffer and 16:9 aspect without complaint). start-windowed.bat
updated accordingly.

Verified live: full-screen native 3D with the cockpit floating over its
edges, mission running, preset lamp lit on the map column.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

BUILD.md

@@ -128,14 +128,13 @@ Two new environment options remove the hardware dependency entirely:
   ```
 
   The cockpit is a fixed **1920×1080 internal canvas** (scaled down
-  uniformly on smaller work areas): the top row is three
-  native-resolution 640×480 glasses spanning exactly 1920, the 800×600
-  viewscreen (launch with `-res 800 600`) sits centered, and the lower
-  MFDs (corners) + portrait map (bottom center) anchor to the bottom
-  edge. The panes deliberately **overlap the viewscreen and render over
-  it** — in the pod the MFD bezels partially occluded the viewport, and
-  the same trick lets a big 3D view and full-size gauges share the
-  canvas. MFDs render green-screen and the map full-color/rotated,
+  uniformly on smaller work areas): the viewscreen fills the whole
+  canvas (launch with `-res 1920 1080` for native 1:1 3D), with compact
+  320×240 MFD glasses in the four corners, the score glass top-center,
+  and the portrait map bottom-center. The panes deliberately **overlap
+  the viewscreen and render over it** — in the pod the MFD bezels
+  partially occluded the viewport, and the same trick gives a
+  full-screen 3D view with the cockpit floating over its edges. MFDs render green-screen and the map full-color/rotated,
   CPU-side from the shared gauge canvas (the packed D3D windows stay
   hidden); the 3D scene presents into the viewscreen pane via
   `Present`'s `hDestWindowOverride` (`gMainPresentWindow`), clipped

MUNGA_L4/L4VB16.cpp

@@ -3908,17 +3908,18 @@ SVGA16::SVGA16(
 		// the z-order, and clipped by those siblings so the 3D present
 		// never draws over them. STATIC hit-tests transparent, so mouse
 		// input over the 3D view reaches the game window as before.
-		// 800x600 (the -res native size), centered on the canvas.
+		// Fills the whole canvas - launch with -res 1920 1080 for
+		// native 1:1 pixels.
 		//---------------------------------------------------------------
-		int view_w = COCKPIT_CANVAS(800);
-		int view_h = COCKPIT_CANVAS(600);
+		int view_w = client_w;
+		int view_h = client_h;
 
 		if (cockpit != NULL)
 		{
 			cockpitViewscreen = CreateWindowExA(
 				0, "STATIC", "",
 				WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | SS_BLACKRECT,
-				(client_w - view_w) / 2, (client_h - view_h) / 2,
+				0, 0,
 				view_w, view_h,
 				cockpit, NULL, GetModuleHandleA(NULL), NULL);
 			if (cockpitViewscreen != NULL)
@@ -3934,8 +3935,9 @@ SVGA16::SVGA16(
 		//   0x37.. / lower left 0x0F.. / lower right 0x07.. and the map
 		//   flanked by Secondary 0x10-0x15 / Screen 0x18-0x1D.
 		//---------------------------------------------------------------
-		int top_glass_w = COCKPIT_CANVAS(640);
-		int top_glass_h = COCKPIT_CANVAS(480);
+		// all five MFDs at the compact size, corners + top center
+		int top_glass_w = COCKPIT_CANVAS(320);
+		int top_glass_h = COCKPIT_CANVAS(240);
 		int bot_glass_w = COCKPIT_CANVAS(320);
 		int bot_glass_h = COCKPIT_CANVAS(240);
 		int map_glass_w = COCKPIT_CANVAS(240);

pack-dist.ps1

@@ -81,8 +81,9 @@ TARGETFPS=60
 Set-Content -Path "$dist\start-windowed.bat" -Encoding ascii -Value @"
 @echo off
 rem Red Planet 4.12 - desktop prototype (windowed, local test mission)
+rem The cockpit canvas is 1920x1080; -res matches it for native 3D.
 cd /d "%~dp0"
-start rpl4opt.exe -windowed -res 800 600 -egg TEST.EGG
+start rpl4opt.exe -windowed -res 1920 1080 -egg TEST.EGG
 "@
 
 Set-Content -Path "$dist\README.txt" -Encoding ascii -Value @"