Reduce volumetrics mem usage

Shaders/blur_bilat_blend_pass/blur_bilat_blend_pass.frag.glsl

@@ -0,0 +1,125 @@
+// Exclusive to volumetric light for now
+#version 450
+
+#include "compiled.glsl"
+
+uniform sampler2D tex;
+uniform vec2 dir;
+uniform vec2 screenSize;
+
+in vec2 texCoord;
+out vec4 fragColor;
+
+const float weight[10] = float[] (0.132572, 0.125472, 0.106373, 0.08078, 0.05495, 0.033482, 0.018275, 0.008934, 0.003912, 0.001535);
+
+float normpdf(float x, float sigma) {
+	return 0.39894 * exp(-0.5 * x * x / (sigma * sigma)) / sigma;
+}
+
+float normpdf3(vec3 v, float sigma) {
+	return 0.39894 * exp(-0.5 * dot(v, v) / (sigma * sigma)) / sigma;
+}
+
+void main() {
+	vec2 step = (dir / screenSize.xy);
+	vec3 colf = texture(tex, texCoord).rgb * weight[0];
+
+	float col;
+	float res;
+	float sumfactor = 0.0;
+	float factor;
+	float f = 1.0 / normpdf(0.0, 1.0);
+
+	col = texture(tex, texCoord + step).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[1];
+	sumfactor += factor;
+	res = factor * col;
+
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[1];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[2];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[2];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[3];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[3];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[4];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[4];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[5];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[5];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[6];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[6];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[7];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[7];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[8];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[8];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[9];
+	sumfactor += factor;
+	res += factor * col;
+
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[9];
+	sumfactor += factor;
+	res += factor * col;
+
+	res /= sumfactor;
+	fragColor = vec4(volumAirColor * res, 1.0);
+}

Shaders/blur_bilat_blend_pass/blur_bilat_blend_pass.json

@@ -0,0 +1,30 @@
+{
+	"contexts": [
+		{
+			"name": "blur_bilat_blend_pass_y",
+			"color_write_alpha": false,
+			"depth_write": false,
+			"compare_mode": "always",
+			"cull_mode": "none",
+			"blend_source": "blend_one",
+			"blend_destination": "blend_one",
+			"blend_operation": "add",
+			"alpha_blend_source": "blend_one",
+			"alpha_blend_destination": "blend_one",
+			"alpha_blend_operation": "add",
+			"links": [
+				{
+					"name": "dir",
+					"link": "_vec2y"
+				},
+				{
+					"name": "screenSize",
+					"link": "_screenSize"
+				}
+			],
+			"texture_params": [],
+			"vertex_shader": "../include/pass.vert.glsl",
+			"fragment_shader": "blur_bilat_blend_pass.frag.glsl"
+		}
+	]
+}

Shaders/blur_bilat_pass/blur_bilat_pass.frag.glsl

@@ -8,7 +8,7 @@ uniform vec2 dir;
 uniform vec2 screenSize;
 
 in vec2 texCoord;
-out vec4 fragColor;
+out float fragColor;
 
 const float weight[10] = float[] (0.132572, 0.125472, 0.106373, 0.08078, 0.05495, 0.033482, 0.018275, 0.008934, 0.003912, 0.001535);
 
@@ -24,100 +24,100 @@ void main() {
 	vec2 step = (dir / screenSize.xy);
 	vec3 colf = texture(tex, texCoord).rgb * weight[0];
 
-	vec3 col;
+	float col;
 	float sumfactor = 0.0;
 	float factor;
-	float f = 1.0 / normpdf(0.0, 0.1);
+	float f = 1.0 / normpdf(0.0, 1.0);
 
-	col = texture(tex, texCoord + step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[1];
+	col = texture(tex, texCoord + step).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[1];
 	sumfactor += factor;
-	fragColor.rgb = factor * col;
+	fragColor = factor * col;
 
-	col = texture(tex, texCoord - step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[1];
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[1];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord + step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[2];
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[2];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord - step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[2];
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[2];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord + step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[3];
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[3];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord - step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[3];
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[3];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord + step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[4];
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[4];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord - step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[4];
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[4];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord + step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[5];
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[5];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord - step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[5];
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[5];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord + step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[6];
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[6];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord - step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[6];
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[6];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord + step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[7];
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[7];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord - step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[7];
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[7];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord + step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[8];
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[8];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord - step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[8];
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[8];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord + step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[9];
+	col = texture(tex, texCoord + step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[9];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	col = texture(tex, texCoord - step * 1.5).rgb;
-	factor = normpdf3(col - colf, 0.1) * f * weight[9];
+	col = texture(tex, texCoord - step * 1.5).r;
+	factor = normpdf3(col - colf, 1.0) * f * weight[9];
 	sumfactor += factor;
-	fragColor.rgb += factor * col;
+	fragColor += factor * col;
 
-	fragColor.rgb /= sumfactor;
+	fragColor /= sumfactor;
 }

Shaders/volumetric_light/volumetric_light.frag.glsl

@@ -17,20 +17,18 @@ uniform mat4 invVP;
 uniform mat4 LWVP;
 uniform vec3 eye;
 uniform vec3 lightPos;
-uniform vec3 lightColor;
 uniform float lightRadius;
 uniform float shadowsBias;
 uniform int lightShadow;
 uniform vec2 lightPlane;
 
 in vec4 wvpposition;
-out vec4 fragColor;
+out float fragColor;
 
 const float tScat = 0.08;
 const float tAbs = 0.0;
 const float tExt = tScat + tAbs;
 const float stepLen = 1.0 / volumSteps;
-
 const float lighting = 0.4;
 // float lighting(vec3 p) {
 	// vec3 L = lightPos.xyz - p.xyz;
@@ -65,10 +63,8 @@ void rayStep(inout vec3 curPos, inout float curOpticalDepth, inout float scatter
 void main() {
 	vec2 screenPosition = wvpposition.xy / wvpposition.w;
 	vec2 texCoord = screenPosition * 0.5 + 0.5;
-	// texCoord += vec2(0.5 / screenSize); // Half pixel offset
 
-	float pixelRayMarchNoise = texture(snoise, texCoord).r * 2.0 - 1.0;
-	pixelRayMarchNoise *= 0.2;
+	float pixelRayMarchNoise = texture(snoise, texCoord * 100).r * 2.0 - 1.0;
 
 	float depth = texture(gbufferD, texCoord).r * 2.0 - 1.0;
 	vec3 worldPos = getPos2(invVP, depth, texCoord);
@@ -93,5 +89,5 @@ void main() {
 		rayStep(curPos, curOpticalDepth, scatteredLightAmount, stepLenWorld, viewVecNorm);
 	}
 
-	fragColor = vec4(vec3(scatteredLightAmount * volumAirColor * normalize(lightColor.rgb) * volumAirTurbidity), 1.0);
+	fragColor = scatteredLightAmount * volumAirTurbidity;
 }

Shaders/volumetric_light/volumetric_light.json

@@ -38,10 +38,6 @@
 					"name": "lightRadius",
 					"link": "_lampRadius"
 				},
-				{
-					"name": "lightColor",
-					"link": "_lampColor"
-				},
 				{
 					"name": "snoise",
 					"link": "_noise8"

Shaders/volumetric_light_quad/volumetric_light_quad.frag.glsl

@@ -12,7 +12,11 @@ uniform sampler2D gbufferD;
 #endif
 uniform sampler2D snoise;
 
-uniform mat4 LWVP;
+#ifdef _CSM
+	//!uniform vec4 casData[shadowmapCascades * 4 + 4];
+#else
+	uniform mat4 LWVP;
+#endif
 uniform float shadowsBias;
 // uniform vec3 lightPos;
 uniform vec3 lightColor;
@@ -25,13 +29,12 @@ uniform vec2 cameraProj;
 
 in vec2 texCoord;
 in vec3 viewRay;
-out vec4 fragColor;
+out float fragColor;
 
 const float tScat = 0.08;
 const float tAbs = 0.0;
 const float tExt = tScat + tAbs;
 const float stepLen = 1.0 / volumSteps;
-
 const float lighting = 0.4;
 // float lighting(vec3 p) {
 	// vec3 L = lightPos.xyz - p.xyz;
@@ -51,6 +54,9 @@ void rayStep(inout vec3 curPos, inout float curOpticalDepth, inout float scatter
 	curOpticalDepth *= exp(-tExt * stepLenWorld * density);
 
 	float visibility = 1.0;
+	#ifdef _CSM
+    mat4 LWVP = mat4(casData[4 + 0], casData[4 + 1], casData[4 + 2], casData[4 + 3]);
+	#endif
 	vec4 lampPos = LWVP * vec4(curPos, 1.0);
 	if (lampPos.w > 0.0) {
 		lampPos.xyz /= lampPos.w;
@@ -62,8 +68,7 @@ void rayStep(inout vec3 curPos, inout float curOpticalDepth, inout float scatter
 
 void main() {
 
-	float pixelRayMarchNoise = texture(snoise, texCoord).r * 2.0 - 1.0;
-	pixelRayMarchNoise *= 0.2;
+	float pixelRayMarchNoise = texture(snoise, texCoord * 100).r * 2.0 - 1.0;
 
 	float depth = texture(gbufferD, texCoord).r * 2.0 - 1.0;
 	vec3 worldPos = getPos(eye, eyeLook, viewRay, depth, cameraProj);
@@ -88,5 +93,5 @@ void main() {
 		rayStep(curPos, curOpticalDepth, scatteredLightAmount, stepLenWorld, viewVecNorm);
 	}
 
-	fragColor = vec4(vec3(scatteredLightAmount * volumAirColor * normalize(lightColor.rgb) * volumAirTurbidity), 1.0);
+	fragColor = scatteredLightAmount * volumAirTurbidity;
 }

Shaders/volumetric_light_quad/volumetric_light_quad.json

@@ -12,7 +12,8 @@
 				},
 				{
 					"name": "LWVP",
-					"link": "_biasLampWorldViewProjectionMatrix"
+					"link": "_biasLampWorldViewProjectionMatrix",
+					"ifndef": ["_CSM"]
 				},
 				{
 					"name": "shadowsBias",
@@ -28,10 +29,6 @@
 					"link": "_lampRadius",
 					"ifdef": ["_Disabled"]
 				},
-				{
-					"name": "lightColor",
-					"link": "_lampColor"
-				},
 				{
 					"name": "snoise",
 					"link": "_noise8"
@@ -57,6 +54,11 @@
 				{
 					"name": "cameraProj",
 					"link": "_cameraPlaneProj"
+				},
+				{
+					"name": "casData",
+					"link": "_cascadeData",
+					"ifdef": ["_CSM"]
 				}
 			],
 			"texture_params": [],
@@ -127,6 +129,11 @@
 				{
 					"name": "cameraProj",
 					"link": "_cameraPlaneProj"
+				},
+				{
+					"name": "casData",
+					"link": "_cascadeData",
+					"ifdef": ["_CSM"]
 				}
 			],
 			"texture_params": [],

Sources/armory/renderpath/RenderPathCreator.hx

@@ -138,7 +138,7 @@ class RenderPathCreator {
 			path.loadShader("shader_datas/volumetric_light_quad/volumetric_light_quad");
 			path.loadShader("shader_datas/volumetric_light/volumetric_light");
 			path.loadShader("shader_datas/blur_bilat_pass/blur_bilat_pass_x");
-			path.loadShader("shader_datas/blur_bilat_pass/blur_bilat_pass_y_blend");
+			path.loadShader("shader_datas/blur_bilat_blend_pass/blur_bilat_blend_pass_y");
 			{
 				var t = new RenderTargetRaw();
 				t.name = "bufvola";
@@ -327,7 +327,7 @@ class RenderPathCreator {
 
 				path.setTarget("lbuf");
 				path.bindTarget("bufvolb", "tex");
-				path.drawShader("shader_datas/blur_bilat_pass/blur_bilat_pass_y_blend");
+				path.drawShader("shader_datas/blur_bilat_blend_pass/blur_bilat_blend_pass_y");
 			}
 			#end
 			
@@ -675,7 +675,7 @@ class RenderPathCreator {
 			path.loadShader("shader_datas/volumetric_light_quad/volumetric_light_quad");
 			path.loadShader("shader_datas/volumetric_light/volumetric_light");
 			path.loadShader("shader_datas/blur_bilat_pass/blur_bilat_pass_x");
-			path.loadShader("shader_datas/blur_bilat_pass/blur_bilat_pass_y_blend");
+			path.loadShader("shader_datas/blur_bilat_blend_pass/blur_bilat_blend_pass_y");
 			{
 				var t = new RenderTargetRaw();
 				t.name = "bufvola";
@@ -683,8 +683,9 @@ class RenderPathCreator {
 				t.height = 0;
 				t.displayp = getDisplayp();
 				t.format = "R8";
-				// var ss = getSuperSampling();
-				t.scale = 0.5;
+				var ss = getSuperSampling();
+				if (ss != 1) t.scale = ss;
+				// t.scale = 0.5;
 				path.createRenderTarget(t);
 			}
 			{
@@ -694,8 +695,9 @@ class RenderPathCreator {
 				t.height = 0;
 				t.displayp = getDisplayp();
 				t.format = "R8";
-				// var ss = getSuperSampling();
-				t.scale = 0.5;
+				var ss = getSuperSampling();
+				if (ss != 1) t.scale = ss;
+				// t.scale = 0.5;
 				path.createRenderTarget(t);
 			}
 		}
@@ -1067,7 +1069,7 @@ class RenderPathCreator {
 
 				path.setTarget("tex");
 				path.bindTarget("bufvolb", "tex");
-				path.drawShader("shader_datas/blur_bilat_pass/blur_bilat_pass_y_blend");
+				path.drawShader("shader_datas/blur_bilat_blend_pass/blur_bilat_blend_pass_y");
 			}
 			#end
 		}

blender/arm/make_renderpath.py

@@ -274,6 +274,8 @@ def build():
         assets.add_shader_pass('volumetric_light_quad')
         assets.add_shader_pass('volumetric_light')
         assets.add_shader_pass('blur_bilat_pass')
+        assets.add_shader_pass('blur_bilat_blend_pass')
+        assets.add_embedded_data('noise8.png')
 
     if rpdat.rp_decals:
         assets.add_khafile_def('rp_decals')