Hi Andrew
My graphicsconfigopenvrdx11.xml:
<data class="GraphicConfigData" id="0x423D7F40">
<prop name="Name" data="" />
<prop name="Build" data="1108" />
<prop name="Version" version="2" />
<prop name="Mode" adapter="0" width="1280" height="720" refresh_num="60020" refresh_dem="1000" />
<prop name="Vsync" vsync="0" />
<prop name="FrameLatency" framelatency="1" />
<prop name="AntiAlias" antialias="3" />
<prop name="SMAAFXAA" smaafxaa="0" />
<prop name="Windowed" windowed="1" />
<prop name="TextureFilter" texturefilter="1" />
<prop name="TextureResolution" textureresolution="2" />
<prop name="Brightness" brightness="10" />
<prop name="CarDetailLevel" cardetaillevel="1" />
<prop name="TrackDetailLevel" trackdetaillevel="1" />
<prop name="ShadowDetailLevel" shadowdetaillevel="1" />
<prop name="MotionblurLevel" motionblurLevel="0" />
<prop name="EffectsDetailLevel" effectsdetaillevel="2" />
<prop name="EnvmapDetailLevel" envmapdetaillevel="1" />
<prop name="MirrorEnabled" mirrorenabled="0" />
<prop name="MirrorEnhanced" mirrorenhanced="0" />
<prop name="EnvmapReflectionDetailLevel" envmapreflectiondetaillevel="2" />
<prop name="GraphicsLevel" graphicslevel="4" />
<prop name="SuperSampling" supersampling="0" />
<prop name="LowSuperSampling" lowsupersampling="0" />
<prop name="VRSuperSampling" vrsupersampling="10" />
<prop name="SharpeningStrength" sharpeningstrength="1.000000" />
<prop name="SharpeningClamp" sharpeningclamp="0.090000" />
<prop name="OffsetBias" offsetbias="1.000000" />
"VRSuperSampling" set to 2.0 in-game, and the sharpeningstrength above, made the biggest difference for me...I don't use SteamVR supersampling.
i7-7700k, 1080Ti, 16G RAM, Lenovo Explorer (so mileage may vary)
Cheers