private void DomainSettingsGUI()
{
noiseTypeName.stringValue = NoiseLib.NoiseTypePopup(Styles.noiseType, noiseTypeName.stringValue);
INoiseType noiseType = NoiseLib.GetNoiseTypeInstance(noiseTypeName.stringValue);
noiseTypeParams.stringValue = noiseType?.DoGUI(noiseTypeParams.stringValue);
fractalTypeName.stringValue = NoiseLib.FractalTypePopup(Styles.fractalType, fractalTypeName.stringValue);
IFractalType fractalType = NoiseLib.GetFractalTypeInstance(fractalTypeName.stringValue);
fractalTypeParams.stringValue = fractalType?.DoGUI(fractalTypeParams.stringValue);
}
/// <summary>
/// Sets up the provided Material to be used with this NoiseSettings instance. Some assumptions are made
/// here as far as definitions and variable declarations in the Material's Shader go.
/// float4 _NoiseTranslation, float4 _NoiseRotation, float4 _NoiseScale, and float4x4 _NoiseTransform are
/// assumed to be declared. Sets up the Material using the NoiseType and FractalType SetupMaterial
/// functions.
/// </summary>
/// <param name="mat"> The Material to set up for use with this NoiseSettings instance </param>
public void SetupMaterial(Material mat)
{
INoiseType noiseType = NoiseLib.GetNoiseTypeInstance(domainSettings.noiseTypeName);
IFractalType fractalType = NoiseLib.GetFractalTypeInstance(domainSettings.fractalTypeName);
// set individual transform info
mat.SetVector(ShaderStrings.translation, transformSettings.translation);
mat.SetVector(ShaderStrings.rotation, transformSettings.rotation);
mat.SetVector(ShaderStrings.scale, transformSettings.scale);
// set full transform matrix
mat.SetMatrix(ShaderStrings.transform, trs);
noiseType?.SetupMaterial(mat, domainSettings.noiseTypeParams);
fractalType?.SetupMaterial(mat, domainSettings.fractalTypeParams);
}
/// <summary>
/// Renders a Popup using EditorGUILayout.Popup for all loaded FractalType implementations
/// </summary>
/// <param name="label"> Label prefix for the Popup </param>
/// <param name="selectedName"> The currently selected FractalType name </param>
public static string FractalTypePopup(GUIContent label, string selectedName)
{
string[] names = NoiseLib.GetFractalNames();
int index = NoiseLib.GetFractalIndex(selectedName);
index = index < 0 ? 0 : index;
int newIndex = EditorGUILayout.Popup(label, index, names);
string newName = names[newIndex];
if (newName.CompareTo(selectedName) != 0)
{
selectedName = newName;
}
return(selectedName);
}
public GeneratedShaderInfo(IFractalType fractalType, INoiseType noiseType)
{
this.fractalDesc = fractalType.GetDescription();
this.noiseDesc = noiseType.GetDescription();
this.noiseIncludeStr = string.Format("#include \"{0}\"", noiseDesc.sourcePath);
if (!string.IsNullOrEmpty(fractalDesc.name))
{
this.variantName = string.Format("{0}{1}", fractalDesc.name, noiseDesc.name);
}
else
{
this.variantName = noiseDesc.name;
}
// set the path of the generated file. this will be used when writing the file
// to disk and when adding the include in any generated shaders that use this
// fractal and noise type variant
this.generatedIncludePath = string.Format("{0}/{1}/{2}.hlsl", noiseDesc.outputDir,
fractalDesc.name,
noiseDesc.name);
this.outputDir = string.Format("{0}/{1}", noiseDesc.outputDir, fractalDesc.name);
fractalStructName = string.Format("{0}FractalInput", fractalDesc.name);
noiseStructName = string.Format("{0}NoiseInput", noiseDesc.name);
numFractalInputs = fractalDesc.inputStructDefinition == null ? 0 : fractalDesc.inputStructDefinition.Count;
numNoiseInputs = noiseDesc.inputStructDefinition == null ? 0 : noiseDesc.inputStructDefinition.Count;
fractalParamStr = null;
noiseParamStr = null;
functionInputStr = "";
// construct include paths string
additionalIncludePaths = "\n";
for (int i = 0; i < fractalDesc.additionalIncludePaths.Count; ++i)
{
additionalIncludePaths += $"#include \"{ fractalDesc.additionalIncludePaths[ i ] }\"\n";
}
additionalIncludePaths += "\n";
// generate the string for the fractal type structure as it would appear as a parameter
// in an HLSL function declaration
if (numFractalInputs > 0)
{
fractalParamStr = string.Format("{0} {1}", fractalStructName, "fractalInput");
}
// generate the string for the noise type structure as it would appear as a parameter
// in an HLSL function declaration
if (numNoiseInputs > 0)
{
noiseParamStr = string.Format("{0} {1}", noiseStructName, "noiseInput");
}
// generate the argument string for an HLSL function declaration that would be
// using this combination of noise and fractal type structure definitions
functionParamStr = "";
if (fractalParamStr != null)
{
functionParamStr += fractalParamStr;
functionInputStr += "fractalInput";
}
if (fractalParamStr != null && noiseParamStr != null)
{
functionParamStr += ", ";
functionInputStr += ", ";
}
if (noiseParamStr != null)
{
functionParamStr += noiseParamStr;
functionInputStr += "noiseInput";
}
fractalStructDef = "";
if (numFractalInputs > 0)
{
fractalStructDef = NoiseLib.BuildStructString(fractalStructName, fractalDesc.inputStructDefinition);
string getDefaultFuncStr = NoiseLib.GetDefaultFunctionString(fractalStructName, fractalDesc.inputStructDefinition);
fractalStructDef += $"\n\n{ getDefaultFuncStr }\n\n";
}
noiseStructDef = "";
if (numNoiseInputs > 0)
{
noiseStructDef = NoiseLib.BuildStructString(noiseStructName, noiseDesc.inputStructDefinition);
}
// get input str construction
getInputsStr = "";
getFractalInputStr = NoiseLib.GetInputFunctionCallString(fractalStructName);
getNoiseInputStr = NoiseLib.GetInputFunctionCallString(fractalStructName);
if (numFractalInputs > 0)
{
getInputsStr += getFractalInputStr;
}
if (numFractalInputs > 0 && numNoiseInputs > 0)
{
getInputsStr += ", ";
}
if (numNoiseInputs > 0)
{
getInputsStr += getNoiseInputStr;
}
// get default input str construction
getDefaultInputsStr = "";
getDefaultFractalInputStr = NoiseLib.GetDefaultInputFunctionCallString(fractalStructName);
getDefaultNoiseInputStr = NoiseLib.GetDefaultInputFunctionCallString(noiseStructName);
if (numFractalInputs > 0)
{
getDefaultInputsStr += getDefaultFractalInputStr;
}
if (numFractalInputs > 0 && numNoiseInputs > 0)
{
getDefaultInputsStr += ", ";
}
if (numNoiseInputs > 0)
{
getDefaultInputsStr += getDefaultNoiseInputStr;
}
fractalPropertyDefStr = "";
if (fractalDesc.inputStructDefinition != null &&
fractalDesc.inputStructDefinition.Count > 0)
{
fractalPropertyDefStr = NoiseLib.GetPropertyDefinitionStr(fractalDesc.name, fractalDesc.inputStructDefinition);
fractalPropertyDefStr += "\n" + NoiseLib.GetPropertyFunctionStr(fractalStructName, fractalDesc.name, fractalDesc.inputStructDefinition);
}
}
public override void Eval(FilterContext fc)
{
if (m_noiseSettings == null)
{
m_noiseSettings = ScriptableObject.CreateInstance <NoiseSettings>();
}
m_noiseSettings.useTextureForPositions = m_useHeightmap;
if (m_useHeightmap)
{
m_noiseSettings.positionTexture = fc.renderTextureCollection[FilterContext.Keywords.Heightmap];
}
Vector3 brushPosWS = fc.brushPos;
float brushSize = fc.brushSize;
float brushRotation = fc.brushRotation;
// TODO(wyatt): remove magic number and tie it into NoiseSettingsGUI preview size somehow
float previewSize = 1 / 512f;
// get proper noise material from current noise settings
NoiseSettings noiseSettings = m_noiseSettings;
Material mat = NoiseUtils.GetDefaultBlitMaterial(noiseSettings);
// setup the noise material with values in noise settings
noiseSettings.SetupMaterial(mat);
// convert brushRotation to radians
brushRotation *= Mathf.PI / 180;
// change pos and scale so they match the noiseSettings preview
bool isWorldSpace = false == m_isLocalSpace;
brushSize = isWorldSpace ? brushSize * previewSize : 1;
brushPosWS = isWorldSpace ? brushPosWS * previewSize : Vector3.zero;
// // override noise transform
Quaternion rotQ = Quaternion.AngleAxis(-brushRotation, Vector3.up);
Matrix4x4 translation = Matrix4x4.Translate(brushPosWS);
Matrix4x4 rotation = Matrix4x4.Rotate(rotQ);
Matrix4x4 scale = Matrix4x4.Scale(Vector3.one * brushSize);
Matrix4x4 noiseToWorld = translation * scale;
mat.SetMatrix(NoiseSettings.ShaderStrings.transform, noiseSettings.trs * noiseToWorld);
int pass = NoiseUtils.kNumBlitPasses * NoiseLib.GetNoiseIndex(noiseSettings.domainSettings.noiseTypeName);
RenderTextureDescriptor desc = new RenderTextureDescriptor(fc.destinationRenderTexture.width, fc.destinationRenderTexture.height, RenderTextureFormat.RFloat);
RenderTexture rt = RenderTexture.GetTemporary(desc);
Graphics.Blit(fc.sourceRenderTexture, rt, mat, pass);
Material blendMat = FilterUtility.blendModesMaterial;
blendMat.SetTexture("_MainTex", fc.sourceRenderTexture);
blendMat.SetTexture("_BlendTex", rt);
Graphics.Blit(fc.sourceRenderTexture, fc.destinationRenderTexture, blendMat, 1);
RenderTexture.ReleaseTemporary(rt);
}
/// <summary>
/// Returns a Material reference to the default blit material for the given Type of FractalType.
/// </summary>
/// <remarks> Usage is: Material mat = GetDefaultBlitMaterial( typeof(FbmFractalType) ); </remarks>
/// <returns> A reference to the default blit Material for the specified Type of FractalType </return>
/// <param name="fractalType"> The Type for a given FractalType </param>
public static Material GetDefaultBlitMaterial(Type fractalType)
{
return(NoiseLib.GetGeneratedMaterial(typeof(NoiseBlitShaderGenerator), fractalType));
}
/// <summary>
/// Blits 2D noise defined by the given NoiseSettings instance into the destination RenderTexture
/// using the provided Material.
/// </summary>
/// <param name = "noise"> An instance of NoiseSettings defining the type of noise to render </param>
/// <param name = "dest"> The destination RenderTexture that the noise will be rendered into. </param>
/// <param name = "mat"> The Material to be used for rendering the noise </param>
public static void Blit2D(NoiseSettings noise, RenderTexture dest, Material mat)
{
int pass = NoiseLib.GetNoiseIndex(noise.domainSettings.noiseTypeName);
INTERNAL_Blit2D(noise, dest, mat, pass * kNumBlitPasses + 0);
}
/// <summary>
/// Function that is called when an asset with the ".noisehlsltemplate" extension is imported by the AssetDatabase
/// </summary>
/// <param name = "ctx"> The context for the imported asset </param>
public override void OnImportAsset(AssetImportContext ctx)
{
NoiseLib.GenerateHeaderFiles();
NoiseLib.GenerateShaders();
}
//===================================================================================================
//
// APPLY BRUSH
//
//===================================================================================================
private void ApplyBrushInternal(PaintContext ctx, BrushTransform brushXform, Vector3 brushPosWS,
float brushRotation, float brushStrength, float brushSize, Texture brushTexture)
{
brushPosWS.y = 0;
/*
* blit steps
* 1. blit noise to intermediate RT, this includes all the noise transformations and filters,
* using the appropriate noise material. do this with NoiseUtils.Blit2D?
* 2. use that noise texture and mult it with brushmask to paint height on terrain
*/
// TODO(wyatt): remove magic number and tie it into NoiseSettingsGUI preview size somehow
float previewSize = 1 / 512f;
// get proper noise material from current noise settings
NoiseSettings noiseSettings = this.noiseSettings;
Material matNoise = NoiseUtils.GetDefaultBlitMaterial(noiseSettings);
// setup the noise material with values in noise settings
noiseSettings.SetupMaterial(matNoise);
// convert brushRotation to radians
brushRotation *= Mathf.PI / 180;
// change pos and scale so they match the noiseSettings preview
bool isWorldSpace = (m_toolSettings.coordSpace == CoordinateSpace.World);
brushSize = isWorldSpace ? brushSize * previewSize : 1;
brushPosWS = isWorldSpace ? brushPosWS * previewSize : Vector3.zero;
// // override noise transform
Quaternion rotQ = Quaternion.AngleAxis(-brushRotation, Vector3.up);
Matrix4x4 translation = Matrix4x4.Translate(brushPosWS);
Matrix4x4 rotation = Matrix4x4.Rotate(rotQ);
Matrix4x4 scale = Matrix4x4.Scale(Vector3.one * brushSize);
Matrix4x4 noiseToWorld = translation * scale;
matNoise.SetMatrix(NoiseSettings.ShaderStrings.transform,
noiseSettings.trs * noiseToWorld);
// render the noise field to a texture
// TODO(wyatt): Handle the 3D case. Would need to blit to Volume Texture
int rtW = ctx.destinationRenderTexture.width;
int rtH = ctx.destinationRenderTexture.height;
RenderTextureFormat rtF = RenderTextureFormat.RFloat;
RenderTextureDescriptor rtDesc = new RenderTextureDescriptor(rtW, rtH, rtF);
RenderTexture noiseRT = RenderTexture.GetTemporary(rtDesc);
RenderTexture tempRT = RenderTexture.GetTemporary(noiseRT.descriptor);
RenderTexture prev = RenderTexture.active;
RenderTexture.active = tempRT;
int noisePass = NoiseUtils.kNumBlitPasses * NoiseLib.GetNoiseIndex(noiseSettings.domainSettings.noiseTypeName);
Graphics.Blit(tempRT, matNoise, noisePass);
RenderTexture.active = noiseRT;
// if(noiseSettings.filterSettings.filterStack != null)
// {
// noiseSettings.filterSettings.filterStack.Eval(tempRT, noiseRT);
// }
// else
{
Graphics.Blit(tempRT, noiseRT);
}
RenderTexture.active = prev;
RenderTexture.ReleaseTemporary(tempRT);
// then add the result to the heightmap using the noise height tool shader
Material matFinal = paintMaterial;
TerrainPaintUtility.SetupTerrainToolMaterialProperties(ctx, brushXform, matFinal);
// set brush params
Vector4 brushParams = new Vector4(0.01f * brushStrength, 0.0f, brushSize, 1 / brushSize);
matFinal.SetVector("_BrushParams", brushParams);
matFinal.SetTexture("_BrushTex", brushTexture);
matFinal.SetTexture("_NoiseTex", noiseRT);
matFinal.SetVector("_WorldHeightRemap", m_toolSettings.worldHeightRemap);
Graphics.Blit(ctx.sourceRenderTexture, ctx.destinationRenderTexture, matFinal, 0);
RenderTexture.ReleaseTemporary(noiseRT);
}
private TerrainToolsAnalytics.IBrushParameter[] UpdateAnalyticParameters()
{
m_AnalyticsData.Clear();
SerializedProperty transformSettings = noiseSettingsGUI.serializedNoise.FindProperty("transformSettings");
SerializedProperty domainSettings = noiseSettingsGUI.serializedNoise.FindProperty("domainSettings");
SerializedProperty fractalTypeName = domainSettings.FindPropertyRelative("fractalTypeName");
SerializedProperty fractalTypeParams = domainSettings.FindPropertyRelative("fractalTypeParams");
//Add Generic, Transform, and Domain type settings to be sent as analytic data
m_AnalyticsData.AddRange(new TerrainToolsAnalytics.IBrushParameter[] {
//Generic Settings
new TerrainToolsAnalytics.BrushParameter <string> {
Name = Styles.coordSpace.text,
Value = m_toolSettings.coordSpace.ToString()
},
//Transform Settings
new TerrainToolsAnalytics.BrushParameter <Vector3> {
Name = "Translation",
Value = transformSettings.FindPropertyRelative("translation").vector3Value
},
new TerrainToolsAnalytics.BrushParameter <Vector3> {
Name = "Rotation",
Value = transformSettings.FindPropertyRelative("rotation").vector3Value
},
new TerrainToolsAnalytics.BrushParameter <Vector3> {
Name = "Scale",
Value = transformSettings.FindPropertyRelative("scale").vector3Value
},
new TerrainToolsAnalytics.BrushParameter <bool> {
Name = NoiseSettingsGUI.Styles.flipScaleX.text,
Value = transformSettings.FindPropertyRelative("flipScaleX").boolValue
},
new TerrainToolsAnalytics.BrushParameter <bool> {
Name = NoiseSettingsGUI.Styles.flipScaleY.text,
Value = transformSettings.FindPropertyRelative("flipScaleY").boolValue
},
new TerrainToolsAnalytics.BrushParameter <bool> {
Name = NoiseSettingsGUI.Styles.flipScaleZ.text,
Value = transformSettings.FindPropertyRelative("flipScaleZ").boolValue
},
//Domain
new TerrainToolsAnalytics.BrushParameter <string> {
Name = NoiseSettingsGUI.Styles.noiseType.text,
Value = domainSettings.FindPropertyRelative("noiseTypeName").stringValue
},
new TerrainToolsAnalytics.BrushParameter <string> {
Name = NoiseSettingsGUI.Styles.fractalType.text,
Value = domainSettings.FindPropertyRelative("fractalTypeName").stringValue
}
}
);
//Add fractal specific settings to be sent as analytic data
IFractalType fractalType = NoiseLib.GetFractalTypeInstance(fractalTypeName.stringValue);
switch (domainSettings.FindPropertyRelative("fractalTypeName").stringValue)
{
case "Fbm":
FbmFractalType.FbmFractalInput fbmFractalSettings = (FbmFractalType.FbmFractalInput)fractalType.FromSerializedString(fractalTypeParams.stringValue);
m_AnalyticsData.AddRange(new TerrainToolsAnalytics.IBrushParameter[] {
new TerrainToolsAnalytics.BrushParameter <float> {
Name = FbmFractalType.Styles.octaves.text, Value = fbmFractalSettings.octaves
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = FbmFractalType.Styles.amplitude.text, Value = fbmFractalSettings.amplitude
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = FbmFractalType.Styles.persistence.text, Value = fbmFractalSettings.persistence
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = FbmFractalType.Styles.frequency.text, Value = fbmFractalSettings.frequency
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = FbmFractalType.Styles.lacunarity.text, Value = fbmFractalSettings.lacunarity
},
new TerrainToolsAnalytics.BrushParameter <bool> {
Name = FbmFractalType.Styles.domainWarpSettings.text, Value = fbmFractalSettings.warpEnabled
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = FbmFractalType.Styles.warpIterations.text, Value = fbmFractalSettings.warpIterations
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = FbmFractalType.Styles.warpStrength.text, Value = fbmFractalSettings.warpStrength
},
new TerrainToolsAnalytics.BrushParameter <Vector4> {
Name = FbmFractalType.Styles.warpOffsets.text, Value = fbmFractalSettings.warpOffsets
},
});
break;
case "Strata":
StrataFractalType.StrataFractalInput strataFractalSettings = (StrataFractalType.StrataFractalInput)fractalType.FromSerializedString(fractalTypeParams.stringValue);
m_AnalyticsData.AddRange(new TerrainToolsAnalytics.IBrushParameter[] {
new TerrainToolsAnalytics.BrushParameter <float> {
Name = StrataFractalType.Styles.octaves.text, Value = strataFractalSettings.octaves
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = StrataFractalType.Styles.amplitude.text, Value = strataFractalSettings.amplitude
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = StrataFractalType.Styles.persistence.text, Value = strataFractalSettings.persistence
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = StrataFractalType.Styles.frequency.text, Value = strataFractalSettings.frequency
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = StrataFractalType.Styles.lacunarity.text, Value = strataFractalSettings.lacunarity
},
new TerrainToolsAnalytics.BrushParameter <bool> {
Name = StrataFractalType.Styles.domainWarpSettings.text, Value = strataFractalSettings.warpEnabled
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = StrataFractalType.Styles.warpIterations.text, Value = strataFractalSettings.warpIterations
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = StrataFractalType.Styles.warpStrength.text, Value = strataFractalSettings.warpStrength
},
new TerrainToolsAnalytics.BrushParameter <Vector4> {
Name = StrataFractalType.Styles.warpOffsets.text, Value = strataFractalSettings.warpOffsets
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = StrataFractalType.Styles.strataOffset.text, Value = strataFractalSettings.strataOffset
},
new TerrainToolsAnalytics.BrushParameter <float> {
Name = StrataFractalType.Styles.strataScale.text, Value = strataFractalSettings.strataScale
},
});
break;
case "None":
default:
break;
}
return(m_AnalyticsData.ToArray());
}
//===================================================================================================
//
// APPLY BRUSH
//
//===================================================================================================
private void ApplyBrushInternal(Terrain terrain, PaintContext ctx, BrushTransform brushXform, Vector3 brushPosWS,
float brushRotation, float brushStrength, float brushSize, Texture brushTexture)
{
var prevRT = RenderTexture.active;
brushPosWS.y = 0;
/*
* blit steps
* 1. blit noise to intermediate RT, this includes all the noise transformations and filters,
* using the appropriate noise material. do this with NoiseUtils.Blit2D?
* 2. use that noise texture and mult it with brushmask to paint height on terrain
*/
// TODO(wyatt): remove magic number and tie it into NoiseSettingsGUI preview size somehow
float previewSize = 1 / 512f;
// get proper noise material from current noise settings
NoiseSettings noiseSettings = this.noiseSettings;
Material matNoise = NoiseUtils.GetDefaultBlitMaterial(noiseSettings);
// setup the noise material with values in noise settings
noiseSettings.SetupMaterial(matNoise);
// convert brushRotation to radians
brushRotation *= Mathf.PI / 180;
// change pos and scale so they match the noiseSettings preview
bool isWorldSpace = (m_toolSettings.coordSpace == CoordinateSpace.World);
brushSize = isWorldSpace ? brushSize * previewSize : 1;
brushPosWS = isWorldSpace ? brushPosWS * previewSize : Vector3.zero;
// // override noise transform
var rotQ = Quaternion.AngleAxis(-brushRotation, Vector3.up);
var translation = Matrix4x4.Translate(brushPosWS);
var rotation = Matrix4x4.Rotate(rotQ);
var scale = Matrix4x4.Scale(Vector3.one * brushSize);
var noiseToWorld = translation * scale;
matNoise.SetMatrix(NoiseSettings.ShaderStrings.transform,
noiseSettings.trs * noiseToWorld);
var noisePass = NoiseUtils.kNumBlitPasses * NoiseLib.GetNoiseIndex(noiseSettings.domainSettings.noiseTypeName);
// render the noise field to a texture
// TODO(wyatt): Handle the 3D case. Would need to blit to Volume Texture
var rtDesc = ctx.destinationRenderTexture.descriptor;
rtDesc.graphicsFormat = NoiseUtils.singleChannelFormat;
rtDesc.sRGB = false;
var noiseRT = RTUtils.GetTempHandle(rtDesc);
RenderTexture.active = noiseRT; // keep this
Graphics.Blit(noiseRT, matNoise, noisePass);
// then add the result to the heightmap using the noise height tool shader
Material matFinal = paintMaterial;
var brushMask = RTUtils.GetTempHandle(ctx.sourceRenderTexture.width, ctx.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
Utility.SetFilterRT(commonUI, ctx.sourceRenderTexture, brushMask, matFinal);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(ctx, brushXform, matFinal);
// set brush params
Vector4 brushParams = new Vector4(0.01f * brushStrength, 0.0f, brushSize, 1 / brushSize);
matFinal.SetVector("_BrushParams", brushParams);
matFinal.SetTexture("_BrushTex", brushTexture);
matFinal.SetTexture("_NoiseTex", noiseRT);
matFinal.SetVector("_WorldHeightRemap", m_toolSettings.worldHeightRemap);
Graphics.Blit(ctx.sourceRenderTexture, ctx.destinationRenderTexture, matFinal, 0);
RTUtils.Release(noiseRT);
RTUtils.Release(brushMask);
RenderTexture.active = prevRT;
}