I solved finally and dont know how. Here my system.xml file in Documents/rockstar games/ red dead redemption 2/settings. Maybe work for you too.
<?xml version="1.0" encoding="UTF-8"?>
<rage__fwuiSystemSettingsCollection>
<version value="35" />
<configSource>kSettingsConfig_Safe</configSource>
<graphics>
<tessellation>kSettingLevel_High</tessellation>
<shadowQuality>kSettingLevel_Medium</shadowQuality>
<farShadowQuality>kSettingLevel_Medium</farShadowQuality>
<reflectionQuality>kSettingLevel_Medium</reflectionQuality>
<mirrorQuality>kSettingLevel_Medium</mirrorQuality>
<ssao>kSettingLevel_High</ssao>
<textureQuality>kSettingLevel_Medium</textureQuality>
<particleQuality>kSettingLevel_Medium</particleQuality>
<waterQuality>kSettingLevel_Medium</waterQuality>
<volumetricsQuality>kSettingLevel_Medium</volumetricsQuality>
<lightingQuality>kSettingLevel_Medium</lightingQuality>
<ambientLightingQuality>kSettingLevel_Medium</ambientLightingQuality>
<anisotropicFiltering value="0" />
<taa>kSettingLevel_Medium</taa>
<fxaaEnabled value="true" />
<msaa value="0" />
<graphicsQualityPreset value="0.000000" />
</graphics>
<advancedGraphics>
<API>kSettingAPI_DX12</API>
<locked value="false" />
<asyncComputeEnabled value="false" />
<transferQueuesEnabled value="false" />
<shadowSoftShadows>kSettingLevel_Low</shadowSoftShadows>
<motionBlur value="false" />
<motionBlurLimit value="16.000000" />
<particleLightingQuality>kSettingLevel_Medium</particleLightingQuality>
<waterReflectionSSR value="true" />
<waterRefractionQuality>kSettingLevel_Medium</waterRefractionQuality>
<waterReflectionQuality>kSettingLevel_Medium</waterReflectionQuality>
<waterSimulationQuality value="2" />
<waterLightingQuality>kSettingLevel_High</waterLightingQuality>
<furDisplayQuality>kSettingLevel_Medium</furDisplayQuality>
<maxTexUpgradesPerFrame value="5" />
<shadowGrassShadows>kSettingLevel_Low</shadowGrassShadows>
<shadowParticleShadows value="false" />
<shadowLongShadows value="false" />
<directionalShadowsAlpha value="false" />
<worldHeightShadowQuality value="0.330000" />
<directionalScreenSpaceShadowQuality value="0.330000" />
<ambientMaskVolumesHighPrecision value="false" />
<scatteringVolumeQuality>kSettingLevel_Medium</scatteringVolumeQuality>
<volumetricsRaymarchQuality>kSettingLevel_Medium</volumetricsRaymarchQuality>
<volumetricsLightingQuality>kSettingLevel_Medium</volumetricsLightingQuality>
<volumetricsRaymarchResolutionUnclamped value="false" />
<terrainShadowQuality>kSettingLevel_Medium</terrainShadowQuality>
<damageModelsDisabled value="true" />
<decalQuality>kSettingLevel_Low</decalQuality>
<ssaoFullScreenEnabled value="false" />
<ssaoType value="0" />
<ssdoSampleCount value="4" />
<ssdoUseDualRadii value="false" />
<ssdoResolution>kSettingLevel_Low</ssdoResolution>
<ssdoTAABlendEnabled value="true" />
<ssroSampleCount value="2" />
<snowGlints value="false" />
<POMQuality>kSettingLevel_Low</POMQuality>
<probeRelightEveryFrame value="false" />
<scalingMode>kSettingScale_Mode1o1</scalingMode>
<reflectionMSAA value="0" />
<lodScale value="0.800000" />
<grassLod value="0.750000" />
<pedLodBias value="0.000000" />
<vehicleLodBias value="0.000000" />
<sharpenIntensity value="0.050000" />
<treeQuality>kSettingLevel_Medium</treeQuality>
<deepsurfaceQuality>kSettingLevel_Low</deepsurfaceQuality>
</advancedGraphics>
<video>
<adapterIndex value="0" />
<outputIndex value="0" />
<resolutionIndex value="3" />
<screenWidth value="1366" />
<screenHeight value="768" />
<refreshRateIndex value="0" />
<refreshRateNumerator value="60" />
<refreshRateDenominator value="1" />
<windowed value="0" />
<vSync value="0" />
<tripleBuffered value="false" />
<pauseOnFocusLoss value="false" />
<constrainMousePointer value="false" />
</video>
<videoCardDescription>NVIDIA GeForce GTX 950M</videoCardDescription>
</rage__fwuiSystemSettingsCollection>
