When I left the game I found a lot of shader error message on my terminal window:
0574:fixme:d3d_shader:print_glsl_info_log Info log received from GLSL shader #3:
0574:fixme:d3d_shader:print_glsl_info_log Vertex info
0574:fixme:d3d_shader:print_glsl_info_log -----------
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[2]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[3]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[4]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[5]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[6]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[7]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[8]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[9]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[10]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[11]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[12]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[13]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[14]" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(26) : warning C7050: "vs_out[15]" might be used before being initialized0574:fixme:d3d_shader:print_glsl_info_log Fragment info
0574:fixme:d3d_shader:print_glsl_info_log -------------
0574:fixme:d3d_shader:print_glsl_info_log 0(53) : warning C7050: "R12.w" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(55) : warning C7050: "R14.w" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log Fragment info
0574:fixme:d3d_shader:print_glsl_info_log -------------
0574:fixme:d3d_shader:print_glsl_info_log 0(53) : warning C7050: "R12.w" might be used before being initialized
0574:fixme:d3d_shader:print_glsl_info_log 0(55) : warning C7050: "R14.w" might be used before being initialized
This might be a Wine issue, though...