Shadows for translucent context.

Shaders/deferred/deferred.shader.json

@@ -350,6 +350,16 @@
 					"name": "P",
 					"link": "_projectionMatrix"
 				},
+				{
+					"name": "LWVP",
+					"link": "_lampWorldViewProjectionMatrix",
+					"ifndef": "_NoShadows"
+				},
+				{
+					"name": "shadowsBias",
+					"link": "_lampShadowsBias",
+					"ifndef": "_NoShadows"
+				},
 				{
 					"name": "lightPos",
 					"link": "_lampPosition"

Shaders/deferred/translucent.frag.glsl

@@ -12,10 +12,29 @@ precision mediump float;
 #include "../std/shirr.glsl"
 // shIrradiance()
 //!uniform float shirr[27];
+#ifndef _NoShadows
+	#ifdef _PCSS
+	#include "../std/shadows_pcss.glsl"
+	// PCSS()
+	#else
+	#include "../std/shadows.glsl"
+	// PCF()
+	#endif
+#endif
 
 #ifdef _BaseTex
 	uniform sampler2D sbase;
 #endif
+#ifndef _NoShadows
+	//!uniform sampler2D shadowMap;
+	#ifdef _PCSS
+	//!uniform sampler2D snoise;
+	//!uniform float lampSizeUV;
+	//!uniform float lampNear;
+	#endif
+	uniform float shadowsBias;
+	// uniform bool receiveShadow; // TODO: pass uniform from exporter
+#endif
 
 #ifdef _Rad
 	uniform sampler2D senvmapRadiance;
@@ -63,6 +82,9 @@ in vec3 position;
 #ifdef _Tex
 	in vec2 texCoord;
 #endif
+#ifndef _NoShadows
+	in vec4 lampPos;
+#endif
 in vec4 matColor;
 in vec3 eyeDir;
 #ifdef _NorTex
@@ -72,6 +94,21 @@ in vec3 eyeDir;
 #endif
 out vec4[2] fragColor;
 
+#ifndef _NoShadows
+float shadowTest(vec4 lPos) {
+	lPos.xyz /= lPos.w;
+	lPos.xy = lPos.xy * 0.5 + 0.5;
+	#ifdef _PCSS
+	return PCSS(lPos.xy, lPos.z - shadowsBias);
+	#else
+	return PCF(lPos.xy, lPos.z - shadowsBias);
+	#endif
+	// return VSM(lPos.xy, lPos.z);
+	// float distanceFromLight = texture(shadowMap, lPos.xy).r * 2.0 - 1.0;
+	// return float(distanceFromLight > lPos.z - shadowsBias);
+}
+#endif
+
 void main() {
 	
 #ifdef _NorTex
@@ -94,6 +131,15 @@ void main() {
 	}
 	float dotNL = max(dot(n, l), 0.0);
 
+	float visibility = 1.0;
+#ifndef _NoShadows
+	// if (receiveShadow) {
+		if (lampPos.w > 0.0) {
+			visibility = shadowTest(lampPos);
+		}
+	// }
+#endif
+
 	vec3 baseColor = matColor.rgb;
 #ifdef _BaseTex
 	vec4 texel = texture(sbase, texCoord);
@@ -170,7 +216,7 @@ void main() {
 	indirect = indirect * envmapStrength;// * lightColor * lightStrength;
 
 
-	vec4 premultipliedReflect = vec4(vec3(direct + indirect * occlusion), matColor.a);
+	vec4 premultipliedReflect = vec4(vec3(direct * visibility + indirect * occlusion), matColor.a);
 #ifdef _BaseTex
 		premultipliedReflect.a *= texel.a; // Base color alpha
 #endif

Shaders/deferred/translucent.vert.glsl

@@ -33,6 +33,9 @@ uniform mat4 W;
 uniform mat4 N;
 uniform mat4 V;
 uniform mat4 P;
+#ifndef _NoShadows
+	uniform mat4 LWVP;
+#endif
 uniform vec4 baseCol;
 uniform vec3 eye;
 #ifdef _Skinning
@@ -44,6 +47,9 @@ out vec3 position;
 #ifdef _Tex
 	out vec2 texCoord;
 #endif
+#ifndef _NoShadows
+	out vec4 lampPos;
+#endif
 out vec4 matColor;
 out vec3 eyeDir;
 #ifdef _NorTex
@@ -70,6 +76,10 @@ void main() {
 	sPos.xyz += off;
 #endif
 
+#ifndef _NoShadows
+	lampPos = LWVP * sPos;
+#endif
+
 	mat4 WV = V * W;
 
 #ifdef _Billboard

Shaders/forward/forward.shader.json

@@ -24,7 +24,8 @@
 				},
 				{
 					"name": "LWVP",
-					"link": "_lampWorldViewProjectionMatrix"
+					"link": "_lampWorldViewProjectionMatrix",
+					"ifndef": "_NoShadows"
 				},
 				{
 					"name": "lightPos",

Shaders/forward/mesh.frag.glsl

@@ -102,7 +102,9 @@ in vec3 position;
 #ifdef _Tex1
 	in vec2 texCoord1;
 #endif
-in vec4 lampPos;
+#ifndef _NoShadows
+	in vec4 lampPos;
+#endif
 in vec4 matColor;
 in vec3 eyeDir;
 #ifdef _NorTex

Shaders/forward/mesh.vert.glsl

@@ -44,7 +44,9 @@ uniform mat4 N;
 #endif
 uniform mat4 V;
 uniform mat4 P;
-uniform mat4 LWVP;
+#ifndef _NoShadows
+	uniform mat4 LWVP;
+#endif
 uniform vec4 baseCol;
 uniform vec3 eye;
 #ifdef _Skinning
@@ -62,7 +64,9 @@ out vec3 position;
 #ifdef _Tex1
 	out vec2 texCoord1;
 #endif
-out vec4 lampPos;
+#ifndef _NoShadows
+	out vec4 lampPos;
+#endif
 out vec4 matColor;
 out vec3 eyeDir;
 #ifdef _NorTex
@@ -89,7 +93,9 @@ void main() {
 	sPos.xyz += off;
 #endif
 
+#ifndef _NoShadows
 	lampPos = LWVP * sPos;
+#endif
 
 	mat4 WV = V * W;
 

Shaders/include/shadowmap.frag.glsl

@@ -4,8 +4,26 @@
 precision mediump float;
 #endif
 
+#ifdef _Translucent
+	in vec2 texCoord;
+#endif
+
 out vec4 fragColor;
 
+#ifdef _Translucent
+// #ifdef _BaseTex
+	uniform sampler2D sbase;
+// #endif
+#endif
+
 void main() {
+
+#ifdef _Translucent
+	float a = texture(sbase, texCoord).a;
+	if (a < 0.5) {
+		discard;
+	}
+#endif
+
 	fragColor = vec4(0.0, 0.0, 0.0, 1.0);
 }

Shaders/include/shadowmap.vert.glsl

@@ -31,12 +31,15 @@ in vec3 nor;
 
 uniform mat4 LWVP;
 #ifdef _Billboard
-uniform mat4 WV;
-uniform mat4 P;
+	uniform mat4 WV;
+	uniform mat4 P;
 #endif
 #ifdef _Skinning
 	//!uniform float skinBones[skinMaxBones * 8];
 #endif
+#ifdef _Translucent
+	out vec2 texCoord;
+#endif
 
 void main() {
 	vec4 sPos = vec4(pos, 1.0);
@@ -53,6 +56,10 @@ void main() {
 	sPos.xyz += off;
 #endif
 
+#ifdef _Translucent
+	texCoord = tex;
+#endif
+
 #ifdef _Billboard
 	mat4 constrWV = WV;
 	// Spherical

blender/exporter.py

@@ -2720,10 +2720,6 @@ class ArmoryExporter:
         # Override context
         if material.override_shader_context:
             c['name'] = material.override_shader_context_name
-        # If material has transparency switch to translucent context
-        elif '_Translucent' in defs:
-            defs.remove('_Translucent')
-            c['name'] = ArmoryExporter.translucent_context
         # If material has height map switch to tessellation displacement context
         elif '_HeightTex' in defs:
             c['name'] = ArmoryExporter.mesh_context + 'height'
@@ -2773,6 +2769,16 @@ class ArmoryExporter:
             if wrd.generate_shadows == True:
                 c2 = {}
                 c2['name'] = ArmoryExporter.shadows_context
+                
+                # Opacity for shadowmap in Translucent context
+                if '_Translucent' in defs:
+                    for bt in c['bind_textures']:
+                        if bt['name'] == 'sbase':
+                            c2['bind_textures'] = [bt]
+                            break
+                    # Switch main context to translucent
+                    c['name'] = ArmoryExporter.translucent_context
+
                 o['contexts'].append(c2)
 
         # VGI Voxels enabled, append context