The translator map seems to work with paletted colour values too, and the result is not clamped. Colours are passed to the GPU as unsigned bytes to multiplying by 16 will overflow, so we do the logic in the shader. If we passed floats we could skip the shader logic.

Src/Graphics/New3D/Model.h

@@ -150,6 +150,7 @@ struct Mesh
 	bool layered		= false;		// stencil poly
 	bool highPriority	= false;		// rendered over the top
 	bool transLSelect	= false;		// actually the transparency layer, false = layer 0, true = layer 1
+	bool translatorMap	= false;		// colours are multiplied by 16
 
 	// lighting
 	bool fixedShading	= false;

Src/Graphics/New3D/New3D.cpp

@@ -994,6 +994,7 @@ void CNew3D::SetMeshValues(SortingMesh *currentMesh, PolyHeader &ph)
 	currentMesh->shininess		= ph.Shininess();
 	currentMesh->specularValue	= ph.SpecularValue();
 	currentMesh->fogIntensity	= ph.LightModifier();
+	currentMesh->translatorMap	= ph.TranslatorMap();
 
 	if (currentMesh->textured) {
 
@@ -1135,16 +1136,9 @@ void CNew3D::CacheModel(Model *m, const UINT32 *data)
 			p.faceColour[0] = ((m_polyRAM[m_colorTableAddr + colorIdx] >> 16) & 0xFF);
 		}
 		else {
-
 			p.faceColour[0] = ((ph.header[4] >> 24));
 			p.faceColour[1] = ((ph.header[4] >> 16) & 0xFF);
 			p.faceColour[2] = ((ph.header[4] >> 8) & 0xFF);
-
-			if (ph.TranslatorMap()) {
-				p.faceColour[0] = std::min((p.faceColour[0] * 255) / 16, 255);		// When the translator map is enabled, max colour seems to be 16. Why not 4 bits?
-				p.faceColour[1] = std::min((p.faceColour[1] * 255) / 16, 255);		// We clamp the result because virtua on will overflow for only the smoke effects
-				p.faceColour[2] = std::min((p.faceColour[2] * 255) / 16, 255);		// It's passing 33 instead of a max of 16.
-			}
 		}
 
 		p.faceColour[3] = ph.Transparency();

Src/Graphics/New3D/PolyHeader.cpp

@@ -398,16 +398,16 @@ UINT64 PolyHeader::Hash()
 	hash |= (UINT64)(header[3] & 0xFF);											// bits 0-7 tex width / height / uv smooth
 	hash |= (UINT64)(((header[4] & 0x1F) << 1) | ((header[5] >> 7) & 1)) << 8;	// bits 8-13 x offset
 	hash |= (UINT64)(header[5] & 0x1F) << 14;									// bits 14-18 y offset
-	hash |= (UINT64)Page() << 19;												// bits 19 page
-	hash |= (UINT64)DoubleSided() << 20;										// bits 20 double sided
-	hash |= (UINT64)AlphaTest() << 21;											// bits 21 contour processing
-	hash |= (UINT64)PolyAlpha() << 22;											// bits 22 poly alpha processing
-	hash |= (UINT64)(header[2] & 0xFF) << 23;									// bits 23-30 microtexture / uv mirror
-	hash |= (UINT64)SpecularEnabled() << 31;									// bits 31 enable specular reflection
-	hash |= (UINT64)SmoothShading() << 32;										// bits 32 smooth shading
-	hash |= (UINT64)FixedShading() << 33;										// bits 33 fixed shading
-	hash |= (UINT64)(header[0] >> 26) << 34;									// bits 34-39 specular coefficient (opacity)
-	hash |= (UINT64)(header[6] & 0x3FFFF) << 40;								// bits 40-57 Translucency pattern select / disable lighting / Polygon light modifier / Texture enable / Texture format / Shininess / High priority / Layered polygon / Translucency mode
+	hash |= (UINT64)((header[4] & 0xC0) >> 6) << 19;							// bits 19-20 page / translatormap
+	hash |= (UINT64)DoubleSided() << 21;										// bits 21 double sided
+	hash |= (UINT64)AlphaTest() << 22;											// bits 22 contour processing
+	hash |= (UINT64)PolyAlpha() << 23;											// bits 23 poly alpha processing
+	hash |= (UINT64)(header[2] & 0xFF) << 24;									// bits 24-31 microtexture / uv mirror
+	hash |= (UINT64)SpecularEnabled() << 32;									// bits 32 enable specular reflection
+	hash |= (UINT64)SmoothShading() << 33;										// bits 33 smooth shading
+	hash |= (UINT64)FixedShading() << 34;										// bits 34 fixed shading
+	hash |= (UINT64)(header[0] >> 26) << 35;									// bits 35-40 specular coefficient (opacity)
+	hash |= (UINT64)(header[6] & 0x3FFFF) << 41;								// bits 41-58 Translucency pattern select / disable lighting / Polygon light modifier / Texture enable / Texture format / Shininess / High priority / Layered polygon / Translucency mode
 
 	return hash;
 }

Src/Graphics/New3D/R3DShader.cpp

@@ -29,6 +29,7 @@ void R3DShader::Start()
 	m_layered			= false;
 	m_textureInverted	= false;
 	m_fixedShading		= false;
+	m_translatorMap		= false;
 	m_modelScale		= 1.0f;
 	m_shininess			= 0;
 	m_specularValue		= 0;
@@ -111,6 +112,7 @@ bool R3DShader::LoadShader(const char* vertexShader, const char* fragmentShader)
 	m_locSpecularValue		= glGetUniformLocation(m_shaderProgram, "specularValue");
 	m_locSpecularEnabled	= glGetUniformLocation(m_shaderProgram, "specularEnabled");
 	m_locFixedShading		= glGetUniformLocation(m_shaderProgram, "fixedShading");
+	m_locTranslatorMap		= glGetUniformLocation(m_shaderProgram, "translatorMap");
 
 	m_locSpotEllipse		= glGetUniformLocation(m_shaderProgram, "spotEllipse");
 	m_locSpotRange			= glGetUniformLocation(m_shaderProgram, "spotRange");
@@ -226,6 +228,11 @@ void R3DShader::SetMeshUniforms(const Mesh* m)
 		m_fixedShading = m->fixedShading;
 	}
 
+	if (m_dirtyMesh || m->translatorMap != m_translatorMap) {
+		glUniform1i(m_locTranslatorMap, m->translatorMap);
+		m_translatorMap = m->translatorMap;
+	}
+
 	if (m_dirtyMesh || m->wrapModeU != m_texWrapMode[0] || m->wrapModeV != m_texWrapMode[1]) {
 		m_texWrapMode[0] = m->wrapModeU;
 		m_texWrapMode[1] = m->wrapModeV;

Src/Graphics/New3D/R3DShader.h

@@ -48,6 +48,7 @@ private:
 	GLint m_locBaseTexSize;
 	GLint m_locTextureInverted;
 	GLint m_locTexWrapMode;
+	GLint m_locTranslatorMap;
 
 	// cached mesh values
 	bool	m_textured1;
@@ -60,6 +61,7 @@ private:
 	float	m_specularValue;
 	bool	m_specularEnabled;
 	bool	m_fixedShading;
+	bool	m_translatorMap;
 
 	bool	m_layered;
 	float	m_microTexScale;

Src/Graphics/New3D/R3DShaderQuads.h

@@ -9,6 +9,7 @@ static const char *vertexShaderR3DQuads = R"glsl(
 uniform float	modelScale;
 uniform mat4	modelMat;
 uniform mat4	projMat;
+uniform bool	translatorMap;
 
 // attributes
 in vec4		inVertex;
@@ -30,6 +31,17 @@ out VS_OUT
 	float	discardPoly;	// can't have varying bool (glsl spec)
 } vs_out;
 
+vec4 GetColour(vec4 colour)
+{
+	vec4 c = colour;
+
+	if(translatorMap) {
+		c.rgb *= 16.0;
+	}
+
+	return c;
+}
+
 float CalcBackFace(in vec3 viewVertex)
 {
 	vec3 vt = viewVertex - vec3(0.0);
@@ -44,7 +56,7 @@ void main(void)
 	vs_out.viewVertex	= vec3(modelMat * inVertex);
 	vs_out.viewNormal	= (mat3(modelMat) * inNormal) / modelScale;
 	vs_out.discardPoly	= CalcBackFace(vs_out.viewVertex);
-	vs_out.color    	= inColour;
+	vs_out.color    	= GetColour(inColour);
 	vs_out.texCoord		= inTexCoord;
 	vs_out.fixedShade	= inFixedShade;
 	gl_Position			= projMat * modelMat * inVertex;

Src/Graphics/New3D/R3DShaderTriangles.h

@@ -9,6 +9,7 @@ static const char *vertexShaderR3D = R"glsl(
 uniform float	modelScale;
 uniform mat4	modelMat;
 uniform mat4	projMat;
+uniform bool	translatorMap;
 
 // attributes
 attribute vec4	inVertex;
@@ -26,6 +27,17 @@ varying vec4	fsColor;
 varying float	fsDiscard;			// can't have varying bool (glsl spec)
 varying float	fsFixedShade;
 
+vec4 GetColour(vec4 colour)
+{
+	vec4 c = colour;
+
+	if(translatorMap) {
+		c.rgb *= 16.0;
+	}
+
+	return c;
+}
+
 float CalcBackFace(in vec3 viewVertex)
 {
 	vec3 vt = viewVertex - vec3(0.0);
@@ -40,7 +52,7 @@ void main(void)
 	fsViewVertex	= vec3(modelMat * inVertex);
 	fsViewNormal	= (mat3(modelMat) * inNormal) / modelScale;
 	fsDiscard		= CalcBackFace(fsViewVertex);
-	fsColor    		= inColour;
+	fsColor    		= GetColour(inColour);
 	fsTexCoord		= inTexCoord;
 	fsFixedShade	= inFixedShade;
 	gl_Position		= projMat * modelMat * inVertex;