diff --git a/go.mod b/go.mod
index 8502c3a..63bdcd8 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/emer/emergent/v2
 go 1.22
 
 require (
-	cogentcore.org/core v0.3.4
+	cogentcore.org/core v0.3.5
 	github.com/BurntSushi/toml v1.3.2
 	github.com/stretchr/testify v1.9.0
 	golang.org/x/exp v0.0.0-20240823005443-9b4947da3948
diff --git a/go.sum b/go.sum
index 2bd36fd..ef74d14 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-cogentcore.org/core v0.3.4 h1:cR+tbFHobLYwAdIW7+0WXnnUdinidrnBse6iqnIBuL0=
-cogentcore.org/core v0.3.4/go.mod h1:HiWp9KXOQmYNaW5wdGpMBEHQTVprdsfBzVmTJ8OPk1A=
+cogentcore.org/core v0.3.5 h1:qTW/+GSUbeYYCSi29zdAQ/fnjWg2/E/aTbAMbfAFGfI=
+cogentcore.org/core v0.3.5/go.mod h1:q3OrXihYG2aTE2oG785ad5b6aJ3wzSCXeeD2SSLKWIE=
 github.com/Bios-Marcel/wastebasket v0.0.4-0.20240213135800-f26f1ae0a7c4 h1:6lx9xzJAhdjq0LvVfbITeC3IH9Fzvo1aBahyPu2FuG8=
 github.com/Bios-Marcel/wastebasket v0.0.4-0.20240213135800-f26f1ae0a7c4/go.mod h1:FChzXi1izqzdPb6BiNZmcZLGyTYiT61iGx9Rxx9GNeI=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
diff --git a/netview/layraster.go b/netview/layraster.go
index a6104de..4881559 100644
--- a/netview/layraster.go
+++ b/netview/layraster.go
@@ -10,7 +10,7 @@ import (
 )
 
 func (lm *LayMesh) RasterSize2D() (nVtx, nIndex int) {
-	ss := &lm.Lay.AsEmer().SampleShape
+	ss := lm.Lay.AsEmer().GetSampleShape()
 	nuz := ss.DimSize(0)
 	nux := ss.DimSize(1)
 	nz := nuz*nux + nuz - 1
@@ -24,7 +24,7 @@ func (lm *LayMesh) RasterSize2D() (nVtx, nIndex int) {
 }
 
 func (lm *LayMesh) RasterSize4D() (nVtx, nIndex int) {
-	ss := &lm.Lay.AsEmer().SampleShape
+	ss := lm.Lay.AsEmer().GetSampleShape()
 	npz := ss.DimSize(0) // p = pool
 	npx := ss.DimSize(1)
 	nuz := ss.DimSize(2) // u = unit
@@ -42,7 +42,7 @@ func (lm *LayMesh) RasterSize4D() (nVtx, nIndex int) {
 }
 
 func (lm *LayMesh) RasterSet2DX(vtxAry, normAry, texAry, clrAry math32.ArrayF32, idxAry math32.ArrayU32) {
-	ss := &lm.Lay.AsEmer().SampleShape
+	ss := lm.Lay.AsEmer().GetSampleShape()
 	nuz := ss.DimSize(0)
 	nux := ss.DimSize(1)
 	nz := nuz*nux + nuz - 1
@@ -123,7 +123,7 @@ func (lm *LayMesh) RasterSet2DX(vtxAry, normAry, texAry, clrAry math32.ArrayF32,
 }
 
 func (lm *LayMesh) RasterSet2DZ(vtxAry, normAry, texAry, clrAry math32.ArrayF32, idxAry math32.ArrayU32) {
-	ss := &lm.Lay.AsEmer().SampleShape
+	ss := lm.Lay.AsEmer().GetSampleShape()
 	nuz := ss.DimSize(0)
 	nux := ss.DimSize(1)
 	nx := nuz*nux + nuz - 1
@@ -203,7 +203,7 @@ func (lm *LayMesh) RasterSet2DZ(vtxAry, normAry, texAry, clrAry math32.ArrayF32,
 }
 
 func (lm *LayMesh) RasterSet4DX(vtxAry, normAry, texAry, clrAry math32.ArrayF32, idxAry math32.ArrayU32) {
-	ss := &lm.Lay.AsEmer().SampleShape
+	ss := lm.Lay.AsEmer().GetSampleShape()
 	npz := ss.DimSize(0) // p = pool
 	npx := ss.DimSize(1)
 	nuz := ss.DimSize(2) // u = unit
@@ -304,7 +304,7 @@ func (lm *LayMesh) RasterSet4DX(vtxAry, normAry, texAry, clrAry math32.ArrayF32,
 }
 
 func (lm *LayMesh) RasterSet4DZ(vtxAry, normAry, texAry, clrAry math32.ArrayF32, idxAry math32.ArrayU32) {
-	ss := &lm.Lay.AsEmer().SampleShape
+	ss := lm.Lay.AsEmer().GetSampleShape()
 	npz := ss.DimSize(0) // p = pool
 	npx := ss.DimSize(1)
 	nuz := ss.DimSize(2) // u = unit
diff --git a/netview/netview.go b/netview/netview.go
index 26ad4a5..3527ac5 100644
--- a/netview/netview.go
+++ b/netview/netview.go
@@ -613,7 +613,7 @@ func (nv *NetView) UnitValue(lay emer.Layer, idx []int) (raw, scaled float32, cl
 // scaled is in range -1..1
 func (nv *NetView) UnitValRaster(lay emer.Layer, idx []int, rCtr int) (raw, scaled float32, clr color.RGBA, hasval bool) {
 	lb := lay.AsEmer()
-	idx1d := lb.SampleShape.Offset(idx)
+	idx1d := lb.GetSampleShape().Offset(idx)
 	ridx := lb.SampleIndexes
 	if len(ridx) == 0 { // no rep
 		if idx1d >= lb.Shape.Len() {