Abandoned Dam visual bugs

map has patches of nothing (blank), recovers itself when i go town first and came back..

Also seeing missing background meshes when loading into the Abandoned Dam map from Dried lake. After 3-5 minutes of running around in the area they loaded in.

View of map when first loaded in.


Upper side.


System Info:
Time of this report: 11/27/2015, 18:39:50
Machine name: BANSHEE
Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.151019-1254)
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: BIOS Date: 06/18/10 14:24:56 Ver: 21.03
Processor: AMD Phenom(tm) II X6 1055T Processor (6 CPUs), ~2.8GHz
Memory: 20480MB RAM
Available OS Memory: 20478MB RAM
Page File: 4121MB used, 36833MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode
DxDiag Previously: Crashed in DirectShow (stage 1). Re-running DxDiag with "dontskip" command line parameter or choosing not to bypass information gathering when prompted might result in DxDiag successfully obtaining this information

Display Devices
---------------
Card name: NVIDIA GeForce GTX 660 Ti
Manufacturer: NVIDIA
Chip type: GeForce GTX 660 Ti
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_1183&SUBSYS_28431462&REV_A1
Display Memory: 4038 MB
Dedicated Memory: 1989 MB
Shared Memory: 2048 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: S23C350
Monitor Id: SAM0A36
Native Mode: 1920 x 1080(p) (60.000Hz)
Output Type: HDMI
Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver File Version: 9.18.0013.4475 (English)
Driver Version: 9.18.13.4475
DDI Version: 11
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 11/12/2014 16:20:36, 19966344 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71E3E-52C3-11CF-A966-4E081CC2C435}
Vendor ID: 0x10DE
Device ID: 0x1183
SubSys ID: 0x28431462
Revision ID: 0x00A1
Driver Strong Name: oem81.inf:NVIDIA_SetA_Devices.NTamd64.6.1:Section035:9.18.13.4475:pci\ven_10de&dev_1183
Rank Of Driver: 00E02001
Video Accel: ModeMPEG2_A ModeMPEG2_C ModeVC1_C ModeWMV9_C
Deinterlace Caps: {6CB69578-7617-4637-91E5-1C02DB810285}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=