diff --git a/src/modules/Bond2010_gpu.cu.h b/src/modules/Bond2010_gpu.cu.h
index 7a58455..fdbd7ce 100644
--- a/src/modules/Bond2010_gpu.cu.h
+++ b/src/modules/Bond2010_gpu.cu.h
@@ -63,7 +63,7 @@ namespace Bond2010
 //
 #if !__CUDACC__ && !BUILD_FOR_CPU
 
-	DECLARE_KERNEL(os_Bond2010_kernel(otable_ks ks, gpu_rng_t rng, cint_t::gpu_t comp, cfloat_t::gpu_t XYZ, cfloat_t::gpu_t vcyl));
+	DECLARE_KERNEL(os_Bond2010_kernel(otable_ks ks, gpu_rng_t rng, cint_t::gpu_t comp, cint_t::gpu_t hidden, cfloat_t::gpu_t XYZ, cfloat_t::gpu_t vcyl));
 
 #else // #if !__CUDACC__ && !BUILD_FOR_CPU
 
@@ -166,10 +166,11 @@ namespace Bond2010
 		os_Bond2010_kernel(
 			otable_ks ks, gpu_rng_t rng, 
 			cint_t::gpu_t comp,
+			cint_t::gpu_t hidden,
 			cfloat_t::gpu_t XYZ,
 			cfloat_t::gpu_t vcyl),
 		os_Bond2010_kernel,
-		(ks, rng, comp, XYZ, vcyl)
+		(ks, rng, comp, hidden, XYZ, vcyl)
 	)
 	{
 		using namespace Bond2010;
@@ -178,6 +179,8 @@ namespace Bond2010
 		rng.load(threadID());
 		for(int row=ks.row_begin(); row < ks.row_end(); row++)
 		{
+			if(hidden(row)) { continue; }
+
 			// fetch prerequisites
 			const int cmp = comp(row);
 			
diff --git a/src/modules/Bond2010_host.cpp b/src/modules/Bond2010_host.cpp
index d4c0ad8..635ae2a 100644
--- a/src/modules/Bond2010_host.cpp
+++ b/src/modules/Bond2010_host.cpp
@@ -75,6 +75,7 @@ size_t os_Bond2010::process(otable &in, size_t begin, size_t end, rng_t &rng)
 
 	// fetch prerequisites
 	cint_t   &comp  = in.col<int>("comp");
+	cint_t   &hidden= in.col<int>("hidden");
 	cfloat_t &XYZ   = in.col<float>("XYZ");
 	cfloat_t &vcyl   = in.col<float>("vcyl");
 
@@ -84,7 +85,7 @@ size_t os_Bond2010::process(otable &in, size_t begin, size_t end, rng_t &rng)
 	cuxUploadConst("os_Bond2010_par", static_cast<os_Bond2010_data&>(*this));	// for GPU execution
 	os_Bond2010_par = static_cast<os_Bond2010_data&>(*this);			// for CPU execution
 
-	CALL_KERNEL(os_Bond2010_kernel, otable_ks(begin, end), rng, comp, XYZ, vcyl);
+	CALL_KERNEL(os_Bond2010_kernel, otable_ks(begin, end), rng, comp, hidden, XYZ, vcyl);
 	return nextlink->process(in, begin, end, rng);
 }
 
diff --git a/src/modules/GaussianFeH_gpu.cu.h b/src/modules/GaussianFeH_gpu.cu.h
index 348a35f..86066a7 100644
--- a/src/modules/GaussianFeH_gpu.cu.h
+++ b/src/modules/GaussianFeH_gpu.cu.h
@@ -30,17 +30,19 @@ KERNEL(
 	ks, 3*4,
 	os_GaussianFeH_kernel(
 		otable_ks ks, bit_map applyToComponents, float mean, float sigma, gpu_rng_t rng,
-		cint_t::gpu_t comp,
+		cint_t::gpu_t comp, cint_t::gpu_t hidden,
 		cfloat_t::gpu_t XYZ,
 		cfloat_t::gpu_t FeH),
 	os_GaussianFeH_kernel,
-	(ks, applyToComponents, mean, sigma, rng, comp, XYZ, FeH)
+	(ks, applyToComponents, mean, sigma, rng, comp, hidden, XYZ, FeH)
 )
 {
 	uint32_t tid = threadID();
 	rng.load(tid);
 	for(uint32_t row = ks.row_begin(); row < ks.row_end(); row++)
 	{
+		if(hidden(row)) { continue; }
+
 		int cmp = comp(row);
 		if(!applyToComponents.isset(cmp)) { continue; }
 
diff --git a/src/modules/GaussianFeH_host.cpp b/src/modules/GaussianFeH_host.cpp
index 3aa652d..8676a07 100644
--- a/src/modules/GaussianFeH_host.cpp
+++ b/src/modules/GaussianFeH_host.cpp
@@ -49,7 +49,7 @@ class os_GaussianFeH : public osink
 extern "C" opipeline_stage *create_module_gaussianfeh() { return new os_GaussianFeH(); }	// Factory; called by opipeline_stage::create()
 
 DECLARE_KERNEL(os_GaussianFeH_kernel(otable_ks ks, bit_map applyToComponents, float mean, float sigma, gpu_rng_t rng,
-		cint_t::gpu_t comp,
+		cint_t::gpu_t comp, cint_t::gpu_t hidden,
 		cfloat_t::gpu_t XYZ,
 		cfloat_t::gpu_t FeH));
 
@@ -62,10 +62,11 @@ size_t os_GaussianFeH::process(otable &in, size_t begin, size_t end, rng_t &rng)
 
 	// fetch prerequisites
 	cint_t   &comp  = in.col<int>("comp");
+	cint_t   &hidden= in.col<int>("hidden");
 	cfloat_t &XYZ   = in.col<float>("XYZ");
 	cfloat_t &FeH   = in.col<float>("FeH");
 
-	CALL_KERNEL(os_GaussianFeH_kernel, otable_ks(begin, end), applyToComponents, mean, sigma, rng, comp, XYZ, FeH);
+	CALL_KERNEL(os_GaussianFeH_kernel, otable_ks(begin, end), applyToComponents, mean, sigma, rng, comp, hidden, XYZ, FeH);
 	return nextlink->process(in, begin, end, rng);
 }
 
diff --git a/src/modules/fixedFeH_gpu.cu.h b/src/modules/fixedFeH_gpu.cu.h
index fe61fc8..61ca74f 100644
--- a/src/modules/fixedFeH_gpu.cu.h
+++ b/src/modules/fixedFeH_gpu.cu.h
@@ -27,19 +27,21 @@
 
 #if !__CUDACC__ && !BUILD_FOR_CPU
 
-	DECLARE_KERNEL(os_fixedFeH_kernel(otable_ks ks, bit_map applyToComponents, float fixedFeH, cint_t::gpu_t comp, cfloat_t::gpu_t FeH));
+	DECLARE_KERNEL(os_fixedFeH_kernel(otable_ks ks, bit_map applyToComponents, float fixedFeH, cint_t::gpu_t comp, cint_t::gpu_t hidden, cfloat_t::gpu_t FeH));
 
 #else
 
 	KERNEL(
 		ks, 0,
-		os_fixedFeH_kernel(otable_ks ks, bit_map applyToComponents, float fixedFeH, cint_t::gpu_t comp, cfloat_t::gpu_t FeH),
+		os_fixedFeH_kernel(otable_ks ks, bit_map applyToComponents, float fixedFeH, cint_t::gpu_t comp, cint_t::gpu_t hidden, cfloat_t::gpu_t FeH),
 		os_fixedFeH_kernel,
-		(ks, applyToComponents, fixedFeH, comp, FeH)
+		(ks, applyToComponents, fixedFeH, comp, hidden, FeH)
 	)
 	{
 		for(uint32_t row = ks.row_begin(); row < ks.row_end(); row++)
 		{
+			if(hidden(row)) { continue; }
+
 			int cmp = comp(row);
 			if(!applyToComponents.isset(cmp)) { continue; }
 
diff --git a/src/modules/fixedFeH_host.cpp b/src/modules/fixedFeH_host.cpp
index 2edd803..af06e89 100644
--- a/src/modules/fixedFeH_host.cpp
+++ b/src/modules/fixedFeH_host.cpp
@@ -53,8 +53,9 @@ size_t os_fixedFeH::process(otable &in, size_t begin, size_t end, rng_t &rng)
 	//	- all stars are main sequence
 	cfloat_t &FeH   = in.col<float>("FeH");
 	cint_t  &comp   = in.col<int>("comp");
+	cint_t  &hidden = in.col<int>("hidden");
 
-	CALL_KERNEL(os_fixedFeH_kernel, otable_ks(begin, end), applyToComponents, fixedFeH, comp, FeH);
+	CALL_KERNEL(os_fixedFeH_kernel, otable_ks(begin, end), applyToComponents, fixedFeH, comp, hidden, FeH);
 	return nextlink->process(in, begin, end, rng);
 }
 
diff --git a/src/modules/gal2other_gpu.cu.h b/src/modules/gal2other_gpu.cu.h
index 9270dba..f022dea 100644
--- a/src/modules/gal2other_gpu.cu.h
+++ b/src/modules/gal2other_gpu.cu.h
@@ -32,7 +32,7 @@
 //
 #if !__CUDACC__ && !BUILD_FOR_CPU
 
-	DECLARE_KERNEL(os_gal2other_kernel(otable_ks ks, int coordsys, cdouble_t::gpu_t lb0, cdouble_t::gpu_t out));
+	DECLARE_KERNEL(os_gal2other_kernel(otable_ks ks, int coordsys, cint_t::gpu_t hidden, cdouble_t::gpu_t lb0, cdouble_t::gpu_t out));
 
 #else // #if !__CUDACC__ && !BUILD_FOR_CPU
 
@@ -61,15 +61,17 @@
 
 	KERNEL(
 		ks, 0,
-		os_gal2other_kernel(otable_ks ks, int coordsys, cdouble_t::gpu_t lb0, cdouble_t::gpu_t out),
+		os_gal2other_kernel(otable_ks ks, int coordsys, cint_t::gpu_t hidden, cdouble_t::gpu_t lb0, cdouble_t::gpu_t out),
 		os_gal2other_kernel,
-		(ks, coordsys, lb0, out)
+		(ks, coordsys, hidden, lb0, out)
 	)
 	{
 		using namespace peyton;	// for mathematical constants
 
 		for(uint32_t row = ks.row_begin(); row < ks.row_end(); row++)
 		{
+			if(hidden(row)) { continue; }
+
 			double2 lb, ret;
 
 			// convert to radians
diff --git a/src/modules/gal2other_host.cpp b/src/modules/gal2other_host.cpp
index 9a8037f..6098eac 100644
--- a/src/modules/gal2other_host.cpp
+++ b/src/modules/gal2other_host.cpp
@@ -54,11 +54,12 @@ extern "C" opipeline_stage *create_module_gal2other() { return new os_gal2other(
 size_t os_gal2other::process(otable &in, size_t begin, size_t end, rng_t &rng)
 {
 	cdouble_t &lb   = in.col<double>("lb");
+	cint_t &hidden  = in.col<int>("hidden");
 
 	if(coordsys == EQU)
 	{
 		cdouble_t &out = in.col<double>("radec");
-		CALL_KERNEL(os_gal2other_kernel, otable_ks(begin, end), coordsys, lb, out);
+		CALL_KERNEL(os_gal2other_kernel, otable_ks(begin, end), coordsys, hidden, lb, out);
 	}
 
 	return nextlink->process(in, begin, end, rng);
diff --git a/src/modules/kinTMIII_gpu.cu.h b/src/modules/kinTMIII_gpu.cu.h
index c397985..ab77ab6 100644
--- a/src/modules/kinTMIII_gpu.cu.h
+++ b/src/modules/kinTMIII_gpu.cu.h
@@ -66,7 +66,7 @@ namespace kinTMIII {
 //
 #if !__CUDACC__ && !BUILD_FOR_CPU
 
-	DECLARE_KERNEL(os_kinTMIII_kernel(otable_ks ks, gpu_rng_t rng, cint_t::gpu_t comp, cfloat_t::gpu_t XYZ, cfloat_t::gpu_t vcyl));
+	DECLARE_KERNEL(os_kinTMIII_kernel(otable_ks ks, gpu_rng_t rng, cint_t::gpu_t comp, cint_t::gpu_t hidden, cfloat_t::gpu_t XYZ, cfloat_t::gpu_t vcyl));
 
 #else // #if !__CUDACC__ && !BUILD_FOR_CPU
 
@@ -172,11 +172,11 @@ namespace kinTMIII
 		ks, 3*4,
 		os_kinTMIII_kernel(
 			otable_ks ks, gpu_rng_t rng, 
-			cint_t::gpu_t comp,
+			cint_t::gpu_t comp, cint_t::gpu_t hidden,
 			cfloat_t::gpu_t XYZ,
 			cfloat_t::gpu_t vcyl),
 		os_kinTMIII_kernel,
-		(ks, rng, comp, XYZ, vcyl)
+		(ks, rng, comp, hidden, XYZ, vcyl)
 	)
 	{
 		using namespace kinTMIII;
@@ -208,6 +208,8 @@ namespace kinTMIII
 		uint32_t tid = threadID();
 		for(int row=ks.row_begin(); row < ks.row_end(); row++)
 		{
+			if(hidden(row)) { continue; }
+
 			// fetch prerequisites
 			const int cmp = comp(row);
 			float X = par.Rg - XYZ(row, 0);
diff --git a/src/modules/kinTMIII_host.cpp b/src/modules/kinTMIII_host.cpp
index f3cf597..eee37ef 100644
--- a/src/modules/kinTMIII_host.cpp
+++ b/src/modules/kinTMIII_host.cpp
@@ -74,6 +74,7 @@ size_t os_kinTMIII::process(otable &in, size_t begin, size_t end, rng_t &rng)
 
 	// fetch prerequisites
 	cint_t   &comp  = in.col<int>("comp");
+	cint_t   &hidden = in.col<int>("hidden");
 	cfloat_t &XYZ   = in.col<float>("XYZ");
 	cfloat_t &vcyl   = in.col<float>("vcyl");
 
@@ -83,7 +84,7 @@ size_t os_kinTMIII::process(otable &in, size_t begin, size_t end, rng_t &rng)
 	cuxUploadConst("os_kinTMIII_par", static_cast<os_kinTMIII_data&>(*this));	// for GPU execution
 	os_kinTMIII_par = static_cast<os_kinTMIII_data&>(*this);			// for CPU execution
 
-	CALL_KERNEL(os_kinTMIII_kernel, otable_ks(begin, end), rng, comp, XYZ, vcyl);
+	CALL_KERNEL(os_kinTMIII_kernel, otable_ks(begin, end), rng, comp, hidden, XYZ, vcyl);
 	return nextlink->process(in, begin, end, rng);
 }
 
diff --git a/src/modules/photometricErrors_host.cpp b/src/modules/photometricErrors_host.cpp
index 83c9434..1c5e028 100644
--- a/src/modules/photometricErrors_host.cpp
+++ b/src/modules/photometricErrors_host.cpp
@@ -112,6 +112,7 @@ extern "C" opipeline_stage *create_module_modelphotoerrors() { return new os_mod
 size_t os_photometricErrors::process(otable &in, size_t begin, size_t end, rng_t &rng)
 {
 	// mix-in gaussian error, with sigma drawn from preloaded splines
+	cint_t &hidden = in.col<int>("hidden");
 	FOREACH(columnsToTransform)
 	{
 		cfloat_t::host_t magObs  = in.col<float>(i->obsBandset);
@@ -120,6 +121,7 @@ size_t os_photometricErrors::process(otable &in, size_t begin, size_t end, rng_t
 
 		for(size_t row=begin; row <= end; row++)
 		{
+			if(hidden(row)) { continue; }
 			float mag = magTrue(row, bandIdx);
 			magObs(row, bandIdx) = mag + rng.gaussian(i->sigma(mag));
 		}
diff --git a/src/modules/photometry.h b/src/modules/photometry.h
index 8bebb3c..bcfc4f1 100644
--- a/src/modules/photometry.h
+++ b/src/modules/photometry.h
@@ -34,7 +34,7 @@ struct ALIGN(16) os_photometry_data
 
 #if !__CUDACC__ && !BUILD_FOR_CPU
 
-	DECLARE_KERNEL(os_photometry_kernel(otable_ks ks, bit_map applyToComponents, gcfloat_t Am, gcint_t flags, gcfloat_t DM, gcfloat_t Mr, int nabsmag, gcfloat_t mags, gcfloat_t FeH, gcint_t comp));
+	DECLARE_KERNEL(os_photometry_kernel(otable_ks ks, bit_map applyToComponents, gcfloat_t Am, gcint_t flags, gcfloat_t DM, gcfloat_t Mr, int nabsmag, gcfloat_t mags, gcfloat_t FeH, gcint_t comp, gcint_t hidden));
 
 	// Textures with "isochrones" (note that we're assuming a
 	// single-age population here; no actual dependence on age)
diff --git a/src/modules/photometry_gpu.cu.h b/src/modules/photometry_gpu.cu.h
index dd000c7..a4f19bc 100644
--- a/src/modules/photometry_gpu.cu.h
+++ b/src/modules/photometry_gpu.cu.h
@@ -86,9 +86,9 @@ unsigned int __brev(unsigned int a)
 
 KERNEL(
 	ks, 0,
-	os_photometry_kernel(otable_ks ks, bit_map applyToComponents, gcfloat_t Am, gcint_t flags, gcfloat_t DM, gcfloat_t Mr, int nabsmag, gcfloat_t mags, gcfloat_t FeH, gcint_t comp),
+	os_photometry_kernel(otable_ks ks, bit_map applyToComponents, gcfloat_t Am, gcint_t flags, gcfloat_t DM, gcfloat_t Mr, int nabsmag, gcfloat_t mags, gcfloat_t FeH, gcint_t comp, gcint_t hidden),
 	os_photometry_kernel,
-	(ks, applyToComponents, Am, flags, DM, Mr, nabsmag, mags, FeH, comp)
+	(ks, applyToComponents, Am, flags, DM, Mr, nabsmag, mags, FeH, comp, hidden)
 )
 {
 	os_photometry_data &lt = os_photometry_params;
@@ -96,6 +96,8 @@ KERNEL(
 
 	for(uint32_t row = ks.row_begin(); row < ks.row_end(); row++)
 	{
+		if(hidden(row)) { continue; }
+
 		// should we process this star (based on the galactic model component it belongs to)?
 		int cmp = comp(row);
 		if(!applyToComponents.isset(cmp)) { continue; }
diff --git a/src/modules/photometry_host.cpp b/src/modules/photometry_host.cpp
index a2edcc6..4d17c74 100644
--- a/src/modules/photometry_host.cpp
+++ b/src/modules/photometry_host.cpp
@@ -363,6 +363,7 @@ extern os_photometry_data os_photometry_params;
 size_t os_photometry::process(otable &in, size_t begin, size_t end, rng_t &rng)
 {
 	cint_t &comp     = in.col<int>("comp");
+	cint_t &hidden   = in.col<int>("hidden");
 	cint_t &flags    = in.col<int>(photoFlagsName);
 	cfloat_t &DM     = in.col<float>("DM");
 	cfloat_t &mags   = in.col<float>(bandset2);
@@ -387,7 +388,7 @@ size_t os_photometry::process(otable &in, size_t begin, size_t end, rng_t &rng)
 		cuxUploadConst("os_photometry_params", static_cast<os_photometry_data&>(*this));	// for GPU execution
 		os_photometry_params = static_cast<os_photometry_data&>(*this);				// for CPU execution
 
-		CALL_KERNEL(os_photometry_kernel, otable_ks(begin, end, -1, sizeof(float)*ncolors), applyToComponents, Am, flags, DM, Mr, Mr.width(), mags, FeH, comp);
+		CALL_KERNEL(os_photometry_kernel, otable_ks(begin, end, -1, sizeof(float)*ncolors), applyToComponents, Am, flags, DM, Mr, Mr.width(), mags, FeH, comp, hidden);
 	}
 
 	return nextlink->process(in, begin, end, rng);
diff --git a/src/modules/unresolvedMultiples_gpu.cu.h b/src/modules/unresolvedMultiples_gpu.cu.h
index fef1c78..c333df2 100644
--- a/src/modules/unresolvedMultiples_gpu.cu.h
+++ b/src/modules/unresolvedMultiples_gpu.cu.h
@@ -37,7 +37,7 @@ namespace multiplesAlgorithms
 
 #if !__CUDACC__ && !BUILD_FOR_CPU
 
-	DECLARE_KERNEL(os_unresolvedMultiples_kernel(otable_ks ks, bit_map applyToComponents, gpu_rng_t rng, int nabsmag, cfloat_t::gpu_t M, cfloat_t::gpu_t Msys, cint_t::gpu_t ncomp, cint_t::gpu_t comp, multiplesAlgorithms::algo algo));
+	DECLARE_KERNEL(os_unresolvedMultiples_kernel(otable_ks ks, bit_map applyToComponents, gpu_rng_t rng, int nabsmag, cfloat_t::gpu_t M, cfloat_t::gpu_t Msys, cint_t::gpu_t ncomp, cint_t::gpu_t comp, cint_t::gpu_t hidden, multiplesAlgorithms::algo algo));
 
 #else
 
@@ -79,9 +79,9 @@ namespace multiplesAlgorithms
 
 	KERNEL(
 		ks, 3*4,
-		os_unresolvedMultiples_kernel(otable_ks ks, bit_map applyToComponents, gpu_rng_t rng, int nabsmag, cfloat_t::gpu_t M, cfloat_t::gpu_t Msys, cint_t::gpu_t ncomp, cint_t::gpu_t comp, multiplesAlgorithms::algo algo),
+		os_unresolvedMultiples_kernel(otable_ks ks, bit_map applyToComponents, gpu_rng_t rng, int nabsmag, cfloat_t::gpu_t M, cfloat_t::gpu_t Msys, cint_t::gpu_t ncomp, cint_t::gpu_t comp, cint_t::gpu_t hidden, multiplesAlgorithms::algo algo),
 		os_unresolvedMultiples_kernel,
-		(ks, applyToComponents, rng, nabsmag, M, Msys, ncomp, comp, algo)
+		(ks, applyToComponents, rng, nabsmag, M, Msys, ncomp, comp, hidden, algo)
 	)
 	{
 		/*
@@ -92,6 +92,8 @@ namespace multiplesAlgorithms
 		rng.load(threadID());
 		for(uint32_t row = ks.row_begin(); row < ks.row_end(); row++)
 		{
+			if(hidden(row)) { continue; }
+
 			int cmp = comp(row);
 			if(!applyToComponents.isset(cmp)) { continue; }
 
diff --git a/src/modules/unresolvedMultiples_host.cpp b/src/modules/unresolvedMultiples_host.cpp
index f344855..556c439 100644
--- a/src/modules/unresolvedMultiples_host.cpp
+++ b/src/modules/unresolvedMultiples_host.cpp
@@ -89,6 +89,7 @@ size_t os_unresolvedMultiples::process(otable &in, size_t begin, size_t end, rng
 	//	- galactocentric XYZ coordinates exist in input
 	//	- all stars are main sequence
 	cint_t   &comp  = in.col<int>("comp");
+	cint_t   &hidden = in.col<int>("hidden");
 	cfloat_t &M     = in.col<float>("absmag");
 	cfloat_t &Msys  = in.col<float>(absmagSys);
 	cint_t   &ncomp = in.col<int>(absmagSys+"Ncomp");
@@ -99,7 +100,7 @@ size_t os_unresolvedMultiples::process(otable &in, size_t begin, size_t end, rng
 			t2(::cumLF,	cumLF),
 			t3(::invCumLF,	invCumLF);
 
-		CALL_KERNEL(os_unresolvedMultiples_kernel, otable_ks(begin, end), applyToComponents, rng, Msys.width(), M, Msys, ncomp, comp, algo);
+		CALL_KERNEL(os_unresolvedMultiples_kernel, otable_ks(begin, end), applyToComponents, rng, Msys.width(), M, Msys, ncomp, comp, hidden, algo);
 	}
 	
 	return nextlink->process(in, begin, end, rng);
diff --git a/src/modules/vel2pm_gpu.cu.h b/src/modules/vel2pm_gpu.cu.h
index 2da1ce4..d444d66 100644
--- a/src/modules/vel2pm_gpu.cu.h
+++ b/src/modules/vel2pm_gpu.cu.h
@@ -45,7 +45,8 @@ struct os_vel2pm_data
 			cdouble_t::gpu_t lb0,
 			cfloat_t::gpu_t XYZ,
 			cfloat_t::gpu_t vcyl,
-			cfloat_t::gpu_t pmlb
+			cfloat_t::gpu_t pmlb,
+			cint_t::gpu_t hidden
 		)
 	);
 
@@ -256,14 +257,17 @@ struct os_vel2pm_data
 			cdouble_t::gpu_t lb0,
 			cfloat_t::gpu_t XYZ,
 			cfloat_t::gpu_t vcyl,
-			cfloat_t::gpu_t pmout),
+			cfloat_t::gpu_t pmout,
+			cint_t::gpu_t hidden),
 		os_vel2pm_kernel,
-		(ks, par, rng, lb0, XYZ, vcyl, pmout)
+		(ks, par, rng, lb0, XYZ, vcyl, pmout, hidden)
 	)
 	{
 
 		for(uint32_t row=ks.row_begin(); row < ks.row_end(); row++)
 		{
+			if(hidden(row)) { continue; }
+
 			// fetch prerequisites
 			// NOTE: Single precision should be sufficient here for (l,b)
 			float l = radf(lb0(row, 0));
diff --git a/src/modules/vel2pm_host.cpp b/src/modules/vel2pm_host.cpp
index c13050a..7259c2b 100644
--- a/src/modules/vel2pm_host.cpp
+++ b/src/modules/vel2pm_host.cpp
@@ -67,8 +67,9 @@ size_t os_vel2pm::process(otable &in, size_t begin, size_t end, rng_t &rng)
 	cfloat_t  &XYZ  = in.col<float>("XYZ");
 	cfloat_t  &vcyl = in.col<float>("vcyl");
 	cfloat_t  &pmlb = in.col<float>(output_col_name);
+	cint_t  &hidden = in.col<int>("hidden");
 
-	CALL_KERNEL(os_vel2pm_kernel, otable_ks(begin, end), *this, rng, lb0, XYZ, vcyl,pmlb);
+	CALL_KERNEL(os_vel2pm_kernel, otable_ks(begin, end), *this, rng, lb0, XYZ, vcyl, pmlb, hidden);
 	return nextlink->process(in, begin, end, rng);
 }