diff --git a/CMakeLists.txt b/CMakeLists.txt
index e7affb5..b80473b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,7 @@ set(GLERMINAL_GRID_WIDTH 40 CACHE STRING "")
 set(GLERMINAL_GRID_HEIGHT 25 CACHE STRING "")
 set(GLERMINAL_LAYER_COUNT 64 CACHE STRING "")
 set(GLERMINAL_CELL_SCALE 4 CACHE STRING "")
+set(GLERMINAL_CELL_SIZE 8 CACHE STRING "")
 
 configure_file(source/glerminal-config.h.in glerminal-config.h @ONLY)
 
diff --git a/source/glerminal-config.h.in b/source/glerminal-config.h.in
index a9d58b9..aee3d00 100644
--- a/source/glerminal-config.h.in
+++ b/source/glerminal-config.h.in
@@ -16,7 +16,8 @@ enum
 	GRID_WIDTH = @GLERMINAL_GRID_WIDTH@,
 	GRID_HEIGHT = @GLERMINAL_GRID_HEIGHT@,
 	LAYER_COUNT = @GLERMINAL_LAYER_COUNT@,
-	CELL_SCALE = @GLERMINAL_CELL_SCALE@
+	CELL_SCALE = @GLERMINAL_CELL_SCALE@,
+	CELL_SIZE = @GLERMINAL_CELL_SIZE@
 };
 
 #ifdef __cplusplus
diff --git a/source/glerminal-private.h b/source/glerminal-private.h
index 2f49a82..e9c4db4 100644
--- a/source/glerminal-private.h
+++ b/source/glerminal-private.h
@@ -9,20 +9,18 @@
 #include <GLFW/glfw3.h>
 
 #include <iostream>
-#include <fstream>
-#include <stdexcept>
 #include <map>
 #include <string>
 
 namespace glerminal
 {
-	constexpr unsigned int CELL_SIZE = 8;
 	constexpr unsigned int MAX_SPRITES_ROW = 64;
 	constexpr unsigned int MAX_SPRITES = MAX_SPRITES_ROW * MAX_SPRITES_ROW;
 	constexpr unsigned int GRID_WIDTH = ::GRID_WIDTH;
 	constexpr unsigned int GRID_HEIGHT = ::GRID_HEIGHT;
 	constexpr unsigned int LAYER_COUNT = ::LAYER_COUNT;
 	constexpr unsigned int CELL_SCALE = ::CELL_SCALE;
+	constexpr unsigned int CELL_SIZE = ::CELL_SIZE;
 	constexpr unsigned int GRID_AREA = GRID_WIDTH * GRID_HEIGHT;
 	constexpr unsigned int SCREEN_WIDTH = GRID_WIDTH * CELL_SIZE * CELL_SCALE;
 	constexpr unsigned int SCREEN_HEIGHT = GRID_HEIGHT * CELL_SIZE * CELL_SCALE;
diff --git a/source/glerminal.cpp b/source/glerminal.cpp
index 579c142..56830d6 100644
--- a/source/glerminal.cpp
+++ b/source/glerminal.cpp
@@ -8,6 +8,7 @@
 #define LAYERS_UNIFORM_NAME "layers"
 #define LAYER_COUNT_UNIFORM_NAME "layer_count"
 #define ATLAS_WIDTH_UNIFORM_NAME "atlas_width"
+#define CELL_SIZE_UNIFORM_NAME "cell_size"
 
 namespace
 {
@@ -33,6 +34,7 @@ namespace
 		"layout (location = 2) in int sprite;\n"
 		"layout (location = 3) in vec4 color;\n"
 		"layout (location = 4) in float scale;\n"
+		"uniform float " CELL_SIZE_UNIFORM_NAME ";\n"
 		"uniform vec4 " GRID_SIZE_UNIFORM_NAME ";\n"
 		"uniform int " ATLAS_WIDTH_UNIFORM_NAME ";\n"
 		"out VS_OUT {\n"
@@ -48,7 +50,7 @@ namespace
 		"	vs_out.sprite = sprite;\n"
 		"	vs_out.layer = layer;\n"
 		"	vs_out.layer_color = color;\n"
-		"	vs_out.texcoord = vec2(sprite % " ATLAS_WIDTH_UNIFORM_NAME " + position.x + 1, (sprite / " ATLAS_WIDTH_UNIFORM_NAME ") - position.y) / vec2(" ATLAS_WIDTH_UNIFORM_NAME ") + vec2(-(2 * position.x + 1) * " GRID_SIZE_UNIFORM_NAME ".z / 16, (2 * position.y + 1) * " GRID_SIZE_UNIFORM_NAME ".z / 16);\n"
+		"	vs_out.texcoord = vec2(sprite % " ATLAS_WIDTH_UNIFORM_NAME " + position.x + 1, (sprite / " ATLAS_WIDTH_UNIFORM_NAME ") - position.y) / vec2(" ATLAS_WIDTH_UNIFORM_NAME ") + vec2(-(2 * position.x + 1) * " GRID_SIZE_UNIFORM_NAME ".z / (2 * " CELL_SIZE_UNIFORM_NAME "), (2 * position.y + 1) * " GRID_SIZE_UNIFORM_NAME ".z / (2 * " CELL_SIZE_UNIFORM_NAME "));\n"
 		"	vec2 cell_position = vec2(scale + (gl_InstanceID % int(" GRID_SIZE_UNIFORM_NAME ".y)) - " GRID_SIZE_UNIFORM_NAME ".x * floor((gl_InstanceID % int(" GRID_SIZE_UNIFORM_NAME ".y)) / " GRID_SIZE_UNIFORM_NAME ".x), -floor((gl_InstanceID % int(" GRID_SIZE_UNIFORM_NAME ".y)) / " GRID_SIZE_UNIFORM_NAME ".x));\n"
 		"	vec2 temp = ((position + vec2(-0.5, 0.5)) * scale + cell_position + vec2(-0.5, 0.5)) * " GRID_SIZE_UNIFORM_NAME ".zw * 2 + vec2(-1, 1);\n"
 		"	gl_Position = vec4(scaled_offset.x + temp.x, scaled_offset.y - temp.y, 0, 1);\n"
@@ -64,6 +66,7 @@ namespace
 		"layout (location = 2) in int sprite;\n"
 		"layout (location = 3) in vec4 color;\n"
 		"layout (location = 4) in float scale;\n"
+		"uniform float " CELL_SIZE_UNIFORM_NAME ";\n"
 		"uniform vec4 " GRID_SIZE_UNIFORM_NAME ";\n"
 		"uniform int " ATLAS_WIDTH_UNIFORM_NAME ";\n"
 		"out VS_OUT {\n"
@@ -77,7 +80,7 @@ namespace
 		"	gl_Layer = layer;\n"
 		"	vec2 scaled_offset = 2 * offset * " GRID_SIZE_UNIFORM_NAME ".zw;\n"
 		"	vs_out.sprite = sprite;\n"
-		"	vs_out.texcoord = vec2(sprite % " ATLAS_WIDTH_UNIFORM_NAME " + position.x + 1, (sprite / " ATLAS_WIDTH_UNIFORM_NAME ") - position.y) / vec2(" ATLAS_WIDTH_UNIFORM_NAME ") + vec2(-(2 * position.x + 1) * " GRID_SIZE_UNIFORM_NAME ".z / 16, (2 * position.y + 1) * " GRID_SIZE_UNIFORM_NAME ".z / 16);\n"
+		"	vs_out.texcoord = vec2(sprite % " ATLAS_WIDTH_UNIFORM_NAME " + position.x + 1, (sprite / " ATLAS_WIDTH_UNIFORM_NAME ") - position.y) / vec2(" ATLAS_WIDTH_UNIFORM_NAME ") + vec2(-(2 * position.x + 1) * " GRID_SIZE_UNIFORM_NAME ".z / (2 * " CELL_SIZE_UNIFORM_NAME "), (2 * position.y + 1) * " GRID_SIZE_UNIFORM_NAME ".z / (2 * " CELL_SIZE_UNIFORM_NAME "));\n"
 		"	vs_out.layer_color = color;\n"
 		"	vec2 cell_position = vec2(scale + (gl_InstanceID % int(" GRID_SIZE_UNIFORM_NAME ".y)) - " GRID_SIZE_UNIFORM_NAME ".x * floor((gl_InstanceID % int(" GRID_SIZE_UNIFORM_NAME ".y)) / " GRID_SIZE_UNIFORM_NAME ".x), -floor((gl_InstanceID % int(" GRID_SIZE_UNIFORM_NAME ".y)) / " GRID_SIZE_UNIFORM_NAME ".x));\n"
 		"	vec2 temp = ((position + vec2(-0.5, 0.5)) * scale + cell_position + vec2(-0.5, 0.5)) * " GRID_SIZE_UNIFORM_NAME ".zw * 2 + vec2(-1, 1);\n"
@@ -654,6 +657,7 @@ namespace glerminal
 
 		// setup uniforms
 		glUseProgram(m_program);
+		glUniform1f(glGetUniformLocation(m_program, CELL_SIZE_UNIFORM_NAME), CELL_SIZE);
 		glUniform4f(glGetUniformLocation(m_program, GRID_SIZE_UNIFORM_NAME), GRID_WIDTH + 2, GRID_AREA_2, 1.0f / GRID_WIDTH, 1.0f / GRID_HEIGHT);
 		glUniform1i(glGetUniformLocation(m_program, ATLAS_WIDTH_UNIFORM_NAME), MAX_SPRITES_ROW);