哪位大人能帮忙优化些这个

血战太平洋的文件，虽然把阴影关掉了，但是才快一点点，好像树下还是有阴影，能进一步优化一下吗？

//

// Video Card Name: NVIDIA GeForce FX 5200

// Video Card Memory: 128 MB

// Video Card Family: fx5200

// Video Card Vendor ID: 0x000010DE

// Video Card Device ID: 0x00000322

//

// CPU Clock Rate: 2801 MHz

// System Memory: 768 MB

//

// Default config selection: High

//

set com_machinespeed_mhz "2801"

set com_performanceratio "2.00"

set cg_cull_factor "0.00002"

set cg_max_tempmodels "1024"

set cl_previewBuild "0"

set com_machinespec "1"

set com_machinespeed_mhz "2801"

set com_performanceratio "2.00"

set com_pose_lod_bias "1"

set default_largetextures "0"

set default_machinespec "1"

set default_picmip "1"

set default_ps "1"

set default_screenwidth "640"

set g_enableik "1"

set g_footstepdecals "1"

set g_ragdolldeaths "1"

set r_allow_software "1"

set r_dds "0"

set r_drawdecals "1"

set r_drawshadows "0"

set r_drawterraindecals "0"

set r_largetextures "0"

set r_max_replicant_vertices "2500"

set r_max_replicant_vtx_buf_size "15000"

set r_picmip "0"

set r_postfx_enable "0"

set r_ps_generation "1"

set r_refreshrate "85"

set r_replicant_divide "2"

set r_screenheight "600"

set r_screenwidth "800"

set r_video_memory "128"

set r_vs_generation "1"

set r_vsync "0"

set s_khz "22"

set s_milesdriver "Miles Fast 2D Positional Audio"

set s_numobjects_per_frame "5"

set s_speaker_type "0"