diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9f0a232..5f572d7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,6 +28,8 @@ file(GLOB SHADER_SOURCE_FILES
 	assets/shaders/*.frag
 	assets/shaders/*.vert
 	assets/shaders/*.geom
+	assets/shaders/*.tese
+	assets/shaders/*.tesc
 )
 
 foreach(SHADER_SOURCE ${SHADER_SOURCE_FILES})
diff --git a/Memory/Buffer.hpp b/Memory/Buffer.hpp
index c3f4550..cfd2880 100644
--- a/Memory/Buffer.hpp
+++ b/Memory/Buffer.hpp
@@ -20,7 +20,7 @@ struct Buffer {
 	}
 	template<typename T>
 	inline void upload(const std::vector<T>& data) {
-		upload(reinterpret_cast<uint8_t*>(data.data()), data.size()*sizeof(T));
+		upload(reinterpret_cast<const uint8_t*>(data.data()), data.size()*sizeof(T));
 	}
 
 	operator vk::Buffer& () {
diff --git a/Renderer/Pipeline.cpp b/Renderer/Pipeline.cpp
index d60c869..af80054 100644
--- a/Renderer/Pipeline.cpp
+++ b/Renderer/Pipeline.cpp
@@ -9,7 +9,7 @@
 
 #include <util/log.hpp>
 
-GraphicsPipeline::GraphicsPipeline(vk::Device dev, const std::vector<Shader>& shaders, const vk::Extent2D& extent, const RenderPass& render_pass, vk::ArrayProxy<vk::DescriptorSetLayoutBinding> bindings, const VertexBuffer& vertex_buffer, enum Type type = Type::GLTF) : dev(dev) {
+GraphicsPipeline::GraphicsPipeline(vk::Device dev, const std::vector<Shader>& shaders, const vk::Extent2D& extent, const RenderPass& render_pass, vk::ArrayProxy<vk::DescriptorSetLayoutBinding> bindings, const VertexBuffer& vertex_buffer, enum Type type) : dev(dev) {
 	/* create layout
 	 * Eventually add a graphicspipline constructor that allows specification of layouts etc
 	 * kinda like how Image::Image has all those versions
@@ -80,10 +80,21 @@ GraphicsPipeline::GraphicsPipeline(vk::Device dev, const std::vector<Shader>& sh
 		.primitiveRestartEnable = vk::False,
 	};
 
+	const vk::PipelineTessellationStateCreateInfo* ptesselation_info = nullptr;
+
+	const auto tess_info = vk::PipelineTessellationStateCreateInfo {
+		/* quads*/
+		.patchControlPoints = 4,
+	};
+
+	if(type == Type::eTERRAIN) {
+		ptesselation_info = &tess_info;
+	}
+
 	const auto raster_info = vk::PipelineRasterizationStateCreateInfo {
 		.depthClampEnable = vk::False,
 		.polygonMode = type == Type::eGLTF? vk::PolygonMode::eFill : vk::PolygonMode::eLine,
-		.cullMode = vk::CullModeFlagBits::eBack,
+		.cullMode = vk::CullModeFlagBits::eNone,
 		.frontFace = vk::FrontFace::eCounterClockwise,
 		.depthBiasEnable = vk::False,
 		.lineWidth = 1.0,
@@ -154,7 +165,7 @@ GraphicsPipeline::GraphicsPipeline(vk::Device dev, const std::vector<Shader>& sh
 		.pStages = shader_info.data(),
 		.pVertexInputState = &vertex_input_info,
 		.pInputAssemblyState = &input_asm_info,
-		.pTessellationState = nullptr,
+		.pTessellationState = ptesselation_info,
 		.pViewportState = &viewport_info,
 		.pRasterizationState = &raster_info,
 		.pMultisampleState = &multisample_info,
diff --git a/Renderer/Renderer.cpp b/Renderer/Renderer.cpp
index 49ac42c..ea89672 100644
--- a/Renderer/Renderer.cpp
+++ b/Renderer/Renderer.cpp
@@ -143,6 +143,8 @@ Renderer::Renderer(Window& win) : win(win) {
 
 	const auto features = vk::PhysicalDeviceFeatures{
 		.geometryShader = vk::True,
+		.tessellationShader = vk::True,
+		.fillModeNonSolid = vk::True,
 	};
 
 	auto dev_info = vk::DeviceCreateInfo{
@@ -182,6 +184,7 @@ Renderer::Renderer(Window& win) : win(win) {
 
 	textures = createResources({
 		"assets/textures/oil.jpg",
+		"assets/textures/heightmap.png",
 	});
 
 	std::vector<Shader> shaders = {
@@ -209,7 +212,7 @@ Renderer::Renderer(Window& win) : win(win) {
 
 
 	/* create Terrain */
-	terrain = std::make_unique<Terrain>(phys_dev, dev, textures[0]);
+	terrain = std::make_unique<Terrain>(phys_dev, dev, textures[1]);
 
 	std::vector<Shader> terrain_shaders = {
 		{ dev, "assets/shaders/terrain.vert.spv", vk::ShaderStageFlagBits::eVertex },
@@ -218,7 +221,7 @@ Renderer::Renderer(Window& win) : win(win) {
 		{ dev, "assets/shaders/terrain.frag.spv", vk::ShaderStageFlagBits::eFragment },
 	};
 
-	terrain_pipeline = std::make_unique<GraphicsPipeline>(dev, terrain_shaders, swapchain->extent, *render_pass, bindings, terrain->vertex_buffer, GraphicsPipeline::eTERRAIN);
+	terrain_pipeline = std::make_unique<GraphicsPipeline>(dev, terrain_shaders, swapchain->extent, *render_pass, bindings, *terrain->vertex_buffer, GraphicsPipeline::eTERRAIN);
 
 	for (auto& shader : shaders)
 		shader.cleanup();
@@ -236,7 +239,7 @@ std::vector<Texture> Renderer::createResources(const std::vector<std::string>& n
 	texture_cmd.begin();
 
 	for (const auto& name : names) {
-		ret.push_back({phys_dev, dev, texture_cmd, name});
+		ret.push_back({phys_dev, dev, texture_cmd, name, false});
 	}
 
 	texture_cmd.end();
@@ -338,11 +341,13 @@ void Renderer::draw() {
 	uniform_buffer->upload(UniformData {
 		.mvp = p * cam.view(),
 		.time = time,
-	//	.aspect_ratio= static_cast<float>(sz.width) / static_cast<float>(sz.height),
 		.cam_pos = cam.pos,
+		.viewport = glm::vec2(viewport.width, viewport.y),
+		.tess_factor = tess_factor,
+		.tess_edge_size = tess_edge_size,
 	});
 
-	command_buffer->command_buffer.drawIndexed(models[0]->indices.size(), 10, 0, 0, 0);
+	//command_buffer->command_buffer.drawIndexed(models[0]->indices.size(), 10, 0, 0, 0);
 
 	command_buffer->bind(*terrain_pipeline);
 	command_buffer->command_buffer.setViewport(0, viewport);
@@ -411,10 +416,14 @@ Renderer::~Renderer() {
 	for(auto& model : models)
 		model.reset();
 
+	terrain.reset();
+
 	uniform_buffer.reset();
 	vertex_buffer.reset();
+	terrain_pipeline.reset();
 	pipeline.reset();
 
+
 	for (auto& tex : textures) {
 		tex.cleanup();
 	}
diff --git a/Renderer/Renderer.hpp b/Renderer/Renderer.hpp
index 396e5d2..f43dd23 100644
--- a/Renderer/Renderer.hpp
+++ b/Renderer/Renderer.hpp
@@ -72,4 +72,7 @@ struct Renderer {
 	float time = 0.0;
 	float speed = 1.0;
 	bool running = true;
+
+	float tess_factor;
+	float tess_edge_size = 20.0f;
 };
diff --git a/Renderer/UniformBuffer.hpp b/Renderer/UniformBuffer.hpp
index da2ff63..b1b3c61 100644
--- a/Renderer/UniformBuffer.hpp
+++ b/Renderer/UniformBuffer.hpp
@@ -13,6 +13,9 @@ struct UniformData {
 	glm::mat4 mvp;
 	float time;
 	glm::vec3 cam_pos;
+	glm::vec2 viewport;
+	float tess_factor;
+	float tess_edge_size;
 };
 
 struct UniformBuffer {
diff --git a/Resources/Texture.cpp b/Resources/Texture.cpp
index 0fd8bdf..6c10739 100644
--- a/Resources/Texture.cpp
+++ b/Resources/Texture.cpp
@@ -18,6 +18,7 @@ Texture::Texture(vk::PhysicalDevice phys_dev, vk::Device dev, CommandBuffer& com
 
 
 	image_data = stbi_load(fname.c_str(), reinterpret_cast<int*>(&extent.width), reinterpret_cast<int*>(&extent.height), &n_channels, STBI_rgb_alpha);
+	Log::info("Texture is %dx%d loaded at %p\n", extent.width, extent.height, image_data);
 	extent.depth = 1;
 
 	image = std::make_unique<Image>(phys_dev, dev, extent, vk::Format::eR8G8B8A8Unorm,
@@ -31,8 +32,10 @@ Texture::Texture(vk::PhysicalDevice phys_dev, vk::Device dev, CommandBuffer& com
 		vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent);
 
 	staging->upload(image_data);
-	if(free_memory)
+	if(free_memory) {
 		stbi_image_free(image_data);
+		image_data = nullptr;
+	}
 
 	/* pipeline memory barrier ensures this doesn't get reordered wrong */
 
diff --git a/Scene/Terrain.cpp b/Scene/Terrain.cpp
index 5413d30..9e96954 100644
--- a/Scene/Terrain.cpp
+++ b/Scene/Terrain.cpp
@@ -5,17 +5,16 @@
 
 
 float Terrain::getHeight(int32_t x, int32_t y) {
+	Log::debug("Height queried at %d, %d\n", x, y);
 	if (x < 0)
-		x += heightmap_tex->extent.width;
+		x += 64;
 	if (y < 0)
-		y += heightmap_tex->extent.height;
+		y += 64;
 
-	if (x <= heightmap_tex->extent.width)
-		x -= heightmap_tex->extent.width;
-	if (y <= heightmap_tex->extent.height)
-		y -= heightmap_tex->extent.height;
+	x %= 64;
+	y %= 64;
 
-	return heightmap_tex->image_data[y * heightmap_tex->extent.width + x * 4];
+	return heightmap_tex->image_data[(y * heightmap_tex->extent.height * heightmap_tex->extent.width / 64 + x * heightmap_tex->extent.width / 64) * 4];
 }
 
 Terrain::Terrain(vk::PhysicalDevice phys_dev, vk::Device dev, Texture& tex) : phys_dev(phys_dev), dev(dev) {
@@ -26,12 +25,15 @@ Terrain::Terrain(vk::PhysicalDevice phys_dev, vk::Device dev, Texture& tex) : ph
 	const auto uv_scale = 1.0f;
 	const auto vertex_count = patch_size * patch_size;
 
-	vertices.reserve(vertex_count);
+	vertices.resize(vertex_count);
 
 	for (size_t x = 0; x < patch_size; x++)
 		for (size_t y = 0; y < patch_size; y++)
-			vertices.push_back(Vertex {
-				.pos = glm::vec3(2.0f*x+1.0f - patch_size, 0.0f, 2.0f * y + 1.0f - patch_size),
+			vertices[x + y*patch_size] = (Vertex {
+				.pos = glm::vec3(
+					2.0f * x + 1.0f - patch_size,
+					0.0f,
+					2.0f * y * 1.0f - patch_size),
 				.uv = glm::vec2(static_cast<float>(x)/patch_size, static_cast<float>(y) / patch_size) * uv_scale,
 			});
 
@@ -54,8 +56,8 @@ Terrain::Terrain(vk::PhysicalDevice phys_dev, vk::Device dev, Texture& tex) : ph
 	*		+----+----+----+
 	*/
 
-	for(auto x = 0_u32; x < patch_size; x++)
-		for (auto y = 0_u32; y < patch_size; y++) {
+	for(auto x = 0_i32; x < patch_size; x++)
+		for (auto y = 0_i32; y < patch_size; y++) {
 			float moores_heights[3][3] = {
 				{ getHeight(x - 1, y - 1), getHeight(x - 1, y), getHeight(x - 1, y + 1) },
 				{ getHeight(x + 0, y - 1), getHeight(x + 0, y), getHeight(x + 0, y + 1) },
@@ -84,8 +86,8 @@ Terrain::Terrain(vk::PhysicalDevice phys_dev, vk::Device dev, Texture& tex) : ph
 	const auto w = patch_size - 1;
 	indices.resize(w * w * 4);
 
-	for (auto x = 0_u32; x < patch_size; x++)
-		for (auto y = 0_u32; y < patch_size; y++) {
+	for (auto x = 0_u32; x < w; x++)
+		for (auto y = 0_u32; y < w; y++) {
 			auto idx = x + y * w * 4;
 			indices[idx] = x+y*patch_size;
 			indices[idx+1] = indices[idx] + patch_size;
diff --git a/UI/UI.cpp b/UI/UI.cpp
index bf1bd76..be28d5b 100644
--- a/UI/UI.cpp
+++ b/UI/UI.cpp
@@ -11,7 +11,7 @@
 
 #include <Scene/Camera.hpp>
 
-UI::UI(Renderer* ren) : info{ .flycam = ren->flycam,  .time = ren->time, .cam = ren->cam, }, dev(ren->dev) {
+UI::UI(Renderer* ren) : info{ .flycam = ren->flycam,  .time = ren->time, .cam = ren->cam, .tess_factor = ren->tess_factor, .tess_edge_size = ren->tess_edge_size }, dev(ren->dev) {
 	IMGUI_CHECKVERSION();
 	ImGui::CreateContext();
 
@@ -92,11 +92,8 @@ void UI::newFrame() {
 	ImGui::Text("FPS: %f", info.fps);
 	ImGui::Text("Time: %f", info.time);
 	ImGui::Checkbox("Fly Camera", &info.flycam);
-	ImGui::SliderAngle("Theta", &info.cam.theta, 0.01, 179.9);
-	ImGui::SliderAngle("Phi", &info.cam.phi, 0.0, 360.0, "%.0f def");
-	ImGui::SliderFloat("cam.x", &info.cam.pos.x, -1e2, 1e2);
-	ImGui::SliderFloat("cam.y", &info.cam.pos.y, -1e2, 1e2);
-	ImGui::SliderFloat("cam.z", &info.cam.pos.z, -1e2, 1e2);
+	ImGui::SliderFloat("Tessellation Factor: %f", &info.tess_factor, 0.0, 20.0);
+	ImGui::SliderFloat("Edge Size: %f", &info.tess_edge_size, 0.0, 40.0);
 
 	ImGui::End();
 }
diff --git a/UI/UI.hpp b/UI/UI.hpp
index 8bd8f85..af2683f 100644
--- a/UI/UI.hpp
+++ b/UI/UI.hpp
@@ -15,6 +15,8 @@ struct UI {
 		float& time;
 		/* camera stuff */
 		Camera& cam;
+		float& tess_factor;
+		float& tess_edge_size;
 	} info;
 
 	vk::Device dev;
diff --git a/assets/shaders/terrain.frag b/assets/shaders/terrain.frag
new file mode 100644
index 0000000..bebcef2
--- /dev/null
+++ b/assets/shaders/terrain.frag
@@ -0,0 +1,18 @@
+#version 460 core
+
+layout (location = 0) in vec3 norm;
+layout (location = 1) in vec2 texCoord;
+layout (location = 2) in vec3 pos;
+layout (location = 0) out vec4 FragColor;
+
+layout (set = 0, binding = 0) uniform Matrices {
+	mat4 mvp;
+	float time;
+	vec3 cam_pos;
+};
+
+layout (set = 0, binding = 1) uniform sampler2D tex;     
+
+void main() {
+	FragColor = vec4(1.0);
+}	
\ No newline at end of file
diff --git a/assets/shaders/terrain.frag.spv b/assets/shaders/terrain.frag.spv
new file mode 100644
index 0000000..dfca963
Binary files /dev/null and b/assets/shaders/terrain.frag.spv differ
diff --git a/assets/shaders/terrain.tesc b/assets/shaders/terrain.tesc
new file mode 100644
index 0000000..61de8fe
--- /dev/null
+++ b/assets/shaders/terrain.tesc
@@ -0,0 +1,60 @@
+#version 450 core
+
+layout (set = 0, binding = 0) uniform Matrices {
+	mat4 mvp;
+	float time;
+	vec3 cam_pos;
+	vec2 viewport;
+	float tess_factor;
+	float tess_edge_size;
+};
+
+layout(set = 0, binding = 1) uniform sampler2D heightmap;
+
+layout (vertices = 4) out;
+
+layout (location = 0) in vec3 norm[];
+layout (location = 1) in vec2 texCoord[];
+layout (location = 2) in vec3 pos[];
+
+layout (location = 0) out vec3 _norm[4];
+layout (location = 1) out vec2 _texCoord[4];
+layout (location = 2) out vec3 _pos[4];
+
+
+float screen_space_tess(vec4 p0, vec4 p1) {
+	/* calc midpoint + distance btw the two points */
+	vec4 mid = (p0+p1) / 2.0;
+	float r = distance(p0, p1) / 2.0;
+
+	vec4 v0 = mvp * mid;
+
+	/* projevt into clip spaace */
+	vec4 clip0 = mvp  * (v0 - vec4(r, 0.0, 0.0, 0.0));
+	vec4 clip1 = mvp  * (v0 + vec4(r, 0.0, 0.0, 0.0));
+
+	clip0 /= clip0.w;
+	clip1 /= clip1.w;
+
+	/* convert to viewport coords */
+	clip0.xy * viewport;
+	clip1.xy * viewport;
+
+	return clamp(distance(clip0, clip0) / tess_edge_size * tess_factor, 1.0, 64.0);
+}
+
+void main() {
+	if(gl_InvocationID == 0) {
+		gl_TessLevelOuter[0] = screen_space_tess(gl_in[3].gl_Position, gl_in[0].gl_Position);
+		gl_TessLevelOuter[1] = screen_space_tess(gl_in[0].gl_Position, gl_in[1].gl_Position);
+		gl_TessLevelOuter[2] = screen_space_tess(gl_in[1].gl_Position, gl_in[2].gl_Position);
+		gl_TessLevelOuter[3] = screen_space_tess(gl_in[2].gl_Position, gl_in[3].gl_Position);
+		gl_TessLevelInner[0] = mix(gl_TessLevelOuter[0], gl_TessLevelOuter[3], 0.5);
+		gl_TessLevelInner[1] = mix(gl_TessLevelOuter[2], gl_TessLevelOuter[1], 0.5);
+	}
+
+	gl_out[gl_InvocationID].gl_Position = gl_in[gl_InvocationID].gl_Position;
+	_norm[gl_InvocationID] = norm[gl_InvocationID];
+	_texCoord[gl_InvocationID] = texCoord[gl_InvocationID];
+	_pos[gl_InvocationID] = pos[gl_InvocationID];
+}
\ No newline at end of file
diff --git a/assets/shaders/terrain.tesc.spv b/assets/shaders/terrain.tesc.spv
new file mode 100644
index 0000000..0752442
Binary files /dev/null and b/assets/shaders/terrain.tesc.spv differ
diff --git a/assets/shaders/terrain.tese b/assets/shaders/terrain.tese
new file mode 100644
index 0000000..ab83884
--- /dev/null
+++ b/assets/shaders/terrain.tese
@@ -0,0 +1,42 @@
+#version 450 core
+
+layout (set = 0, binding = 0) uniform Matrices {
+	mat4 mvp;
+	float time;
+	vec3 cam_pos;
+	vec2 viewport;
+	float tess_factor;
+	float tess_edge_size;
+};
+
+layout(set = 0, binding = 1) uniform sampler2D heightmap;
+
+layout(quads, equal_spacing, ccw) in;
+
+
+layout (location = 0) in vec3 norm[];
+layout (location = 1) in vec2 texCoord[];
+layout (location = 2) in vec3 pos[];
+
+layout (location = 0) out vec3 _norm;
+layout (location = 1) out vec2 _texCoord;
+layout (location = 2) out vec3 _pos;
+
+void main() {
+	/* interpolation of UV coordinates */
+	vec2 uv1 = mix(texCoord[0], texCoord[1], gl_TessCoord.x);
+	vec2 uv2 = mix(texCoord[3], texCoord[2], gl_TessCoord.x);
+	_texCoord = mix(uv1, uv2, gl_TessCoord.y);
+	
+
+	vec3 norm1 = mix(norm[0], norm[1], gl_TessCoord.x);
+	vec3 norm2 = mix(norm[3], norm[2], gl_TessCoord.x);
+	_norm = mix(norm1, norm2, gl_TessCoord.y);
+	
+	/* not displacing yet */
+	vec4 pos1 = mix(gl_in[0].gl_Position, gl_in[1].gl_Position, gl_TessCoord.x);
+	vec4 pos2 = mix(gl_in[3].gl_Position, gl_in[2].gl_Position, gl_TessCoord.x);
+	_pos = mix(pos1, pos2, gl_TessCoord.y).xyz;
+
+	gl_Position = mvp * mix(pos1, pos2, gl_TessCoord.y);
+}
\ No newline at end of file
diff --git a/assets/shaders/terrain.tese.spv b/assets/shaders/terrain.tese.spv
new file mode 100644
index 0000000..5253329
Binary files /dev/null and b/assets/shaders/terrain.tese.spv differ
diff --git a/assets/shaders/terrain.vert b/assets/shaders/terrain.vert
new file mode 100644
index 0000000..55b4d11
--- /dev/null
+++ b/assets/shaders/terrain.vert
@@ -0,0 +1,20 @@
+#version 460 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNorm;
+layout (location = 2) in vec2 aTexCoord;
+
+layout (location = 0) out vec3 norm;
+layout (location = 1) out vec2 texCoord;
+layout (location = 2) out vec3 pos;
+
+layout (set = 0, binding = 0) uniform Matrices {
+	mat4 mvp;
+	float time;
+};
+
+void main() {
+  pos = aPos;
+  gl_Position = vec4(pos, 1.0);
+  texCoord = aTexCoord;
+  norm = aNorm;
+}
\ No newline at end of file
diff --git a/assets/shaders/terrain.vert.spv b/assets/shaders/terrain.vert.spv
new file mode 100644
index 0000000..f6a38da
Binary files /dev/null and b/assets/shaders/terrain.vert.spv differ
diff --git a/assets/textures/heightmap.png b/assets/textures/heightmap.png
new file mode 100644
index 0000000..f5129a7
Binary files /dev/null and b/assets/textures/heightmap.png differ
diff --git a/pléascach.cpp b/pléascach.cpp
index 7ac76c9..e034535 100644
--- a/pléascach.cpp
+++ b/pléascach.cpp
@@ -28,7 +28,7 @@ int main(int argc, char* argv[]) {
 
 			while (in->queue.size()) {
 				/* take event from front of queue, then process it */
-				const auto& event = in->queue.front();
+				const auto event = in->queue.front();
 				in->queue.pop();
 				switch (event.tag) {
 					case InputEvent::Tag::eRESIZE: