[Bug 8848] SWAT4 Areas that should be in shadow and people are rendered solid black

https://bugs.winehq.org/show_bug.cgi?id=8848

--- Comment #22 from Henri Verbeet  ---
The application appears to use the following pixel shader to draw the affected
geometry:

ps_1_1
    def c6 = 1.000000, 0.000000, 0.000000, 0.000000
    texld t[0]
    texld t[1]
    mad t[1].xyz, t[1].w, c[6], t[1]
    dp3 r[0], t[1]_bx2, v[0]_bx2
    mad r[0], r[0], c[1].w, c[1]
    mul r[0].xyz, r[0], c[0]
    mul_x2 r[0].xyz, r[0], t[0]
    +mov r[0].w, t[0].w

As far as I can tell the shader itself gets translated correctly, but c[0] gets
set to {0.0, 0.0, 0.0, 1.0}. This then results in the black geometry. It's not
entirely clear why the application sets the shader constant to that value, and
unfortunately not entirely trivial to find out.