diff --git a/src/main.rs b/src/main.rs
index 967ee41..dce6ee8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -123,6 +123,17 @@ fn main() {
 		cache: None,
 	});
 
+	let state_sampler = device.create_sampler(&wgpu::SamplerDescriptor {
+		label: None,
+		address_mode_u: wgpu::AddressMode::Repeat,
+		address_mode_v: wgpu::AddressMode::Repeat,
+		address_mode_w: wgpu::AddressMode::Repeat,
+		mag_filter: wgpu::FilterMode::Nearest,
+		min_filter: wgpu::FilterMode::Nearest,
+		mipmap_filter: wgpu::FilterMode::Nearest,
+		..Default::default()
+	});
+
 	let mut state = None;
 	#[allow(deprecated)]
 	event_loop
@@ -243,10 +254,16 @@ fn main() {
 						&device.create_bind_group(&wgpu::BindGroupDescriptor {
 							label: None,
 							layout: &step_pipeline.get_bind_group_layout(0),
-							entries: &[wgpu::BindGroupEntry {
-								binding: 0,
-								resource: wgpu::BindingResource::TextureView(&state.last),
-							}],
+							entries: &[
+								wgpu::BindGroupEntry {
+									binding: 0,
+									resource: wgpu::BindingResource::TextureView(&state.last),
+								},
+								wgpu::BindGroupEntry {
+									binding: 1,
+									resource: wgpu::BindingResource::Sampler(&state_sampler),
+								},
+							],
 						}),
 						&[],
 					);
diff --git a/src/step.wgsl b/src/step.wgsl
index b411e3c..09494c3 100644
--- a/src/step.wgsl
+++ b/src/step.wgsl
@@ -7,14 +7,24 @@ struct Varying {
 fn on_vertex(@builtin(vertex_index) vi: u32) -> Varying {
 	let uv = vec2f(vec2(vi, vi >> 1u) & vec2(1u));
 	let screen = vec4(uv * 2. - 1., 0., 1.);
-	return Varying(vec2(uv.x, 1. - uv.y), screen);
+	let off = .5 / vec2f(textureDimensions(field));
+	return Varying(vec2(uv.x, 1. - uv.y) - off, screen);
 }
 
 @group(0) @binding(0) var field: texture_2d<u32>;
+@group(0) @binding(1) var smp: sampler;
 
 @fragment
 fn on_fragment(in: Varying) -> @location(0) u32 {
-	let pos = vec2u(in.screen.xy);
-	let state = textureLoad(field, pos, 0).x;
-	return 1 - state;
+	let a = textureGather(0, field, smp, in.uv, vec2(0, 0));
+	let b = textureGather(0, field, smp, in.uv, vec2(0, 1));
+	let c = textureGather(0, field, smp, in.uv, vec2(1, 0));
+	let d = textureGather(0, field, smp, in.uv, vec2(1, 1));
+	let state = a.y;
+	let n = a.x + a.z + a.w + b.x + b.y + c.y + c.z + d.y;
+	switch (n) {
+	case 2u: { return state; }
+	case 3u: { return 1u; }
+	default: { return 0u; }
+	}
 }