[Bug 10387] New: Civilization 4 world overview sphere rendered/ lit incorrectly

http://bugs.winehq.org/show_bug.cgi?id=10387

Summary: Civilization 4 world overview sphere rendered/lit
                    incorrectly
           Product: Wine
           Version: 0.9.49.
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-directx-d3d
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
                CC: [e-mail]

Created an attachment (id=9066)
 --> (http://bugs.winehq.org/attachment.cgi?id=9066)
Wine v0.9.49 rendering Civ4: Beyond the Sword v3.13's world overview
incorrectly

Firaxis' turn-based strategy game Civilization 4 is played on a 3D game board
modelling the surface of a planetoid. When the camera is close to the ground,
the curvature of the planetoid is not discernable. When zooming out, i.e.
moving the camera away from the ground, the landscape gradually morphs into a
sphere.

While Wine 0.9.49 renders the landscape correctly in all areas of the game
board when the camera is close to the ground, at some point when moving the
camera further out parts of the surface stop being rendered or lit correctly.
Areas of the map that should be brightly rendered are dark, with a hard
transition between the correctly and the incorrectly rendered areas of the
sphere. There does not appear to be a relationship between the demarcation line
and the game logic, as it doesn't follow the game's fog-of-war or border
simulation systems.

Tested releases include 0.9.38, 0.9.44, 0.9.48 and 0.9.49. The problem exists
in all of them. I have reason to believe, based on experiences while bisecting
for an unrelated bug (#9736), that there exists a git revision between 0.9.44
and 0.9.49 where the problem is not apparent, but have so far been unable to
reproduce and track down that revision again.

The Wine configuration is fairly untouched. The Windows version is set to
Windows 2000. Pixel and vertex shader support is enabled. Microsoft's MSXML 3
was installed and related DLL overrides added, which is necessary to run the
game.

The tested version of the game is the very latest, namely "Civilization 4:
Beyond the Sword" at patch level 3.13. "Beyond the Sword" is the second
commercial expansion/upgrade pack to the original title, and the preferred
version to play the game.

Testing was undertaken using nVidia's proprietary graphics driver in version
100.14.19 on a GeForce 8800 GTX, with X.org v7.3 (xorg-server v1.4) and Linux
v2.6.23.1. The distribution is Gentoo Linux.