diff --git a/src/consts.h b/src/consts.h
index 2bb8caa..0c1e8d4 100644
--- a/src/consts.h
+++ b/src/consts.h
@@ -13,7 +13,7 @@ const int IMAGE_WIDTH   = 800;
 const int IMAGE_HEIGHT  = 600;
 
 const double epsilon = 1e-10f;
-const double infty   = 1e15f;  // This vlalue is used to represent missing values in data
+const double infty   = 1e15f;  // This value is used to represent missing values in data
 
 
 // --------------------------- Raycasting Constants ---------------------------
diff --git a/src/gui/MainWindow.cpp b/src/gui/MainWindow.cpp
index fee200d..1451789 100644
--- a/src/gui/MainWindow.cpp
+++ b/src/gui/MainWindow.cpp
@@ -70,6 +70,7 @@ int Window::init_quad(float* data) {
   this->shader = std::make_unique<Shader>("./shaders/vertshader.glsl", "./shaders/fragshader.glsl");
   this->shader->use();
 
+	glUniform1i(glGetUniformLocation(this->shader->ID, "currentFrameTex"), 0);
   return 0;
 }
 
@@ -105,11 +106,6 @@ void Window::tick() {
 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
 	glDisable(GL_DEPTH_TEST);
 
-	glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
-	glClear(GL_COLOR_BUFFER_BIT);
-
-  // render frame
-	glBindFramebuffer(GL_FRAMEBUFFER, this->current_quad->fb);
 	this->current_quad->render();
   this->shader->use();
 	glBindVertexArray(this->current_quad->VAO);
@@ -117,12 +113,9 @@ void Window::tick() {
 	glDrawArrays(GL_TRIANGLES, 0, 6); // draw current frame to texture
   
   // check for events
-  // + swap buffers; TODO: check if necessary?
 	glfwSwapBuffers(this->window);
 	glfwPollEvents();
 
-  std::cout << "done ticking\n";
-  
 }
 
 void Window::resize(unsigned int w, unsigned int h) {
diff --git a/src/gui/MainWindow.h b/src/gui/MainWindow.h
index e7d6c46..62a0e7c 100644
--- a/src/gui/MainWindow.h
+++ b/src/gui/MainWindow.h
@@ -12,7 +12,7 @@ class Window {
 public:
   unsigned int w;
   unsigned int h;
-  float* data; //TODO: dynamic data loading
+  float* data; 
 
   Window(unsigned int w, unsigned int h);
 
diff --git a/src/gui/Quad.cpp b/src/gui/Quad.cpp
index c4fd629..d918763 100644
--- a/src/gui/Quad.cpp
+++ b/src/gui/Quad.cpp
@@ -67,7 +67,7 @@ Quad::Quad(unsigned int w, unsigned int h) {
 void Quad::make_fbo(){
   glGenFramebuffers(1, &fb);
   glBindFramebuffer(GL_FRAMEBUFFER, fb);
-  glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, this->tex, 0);
+  glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex, 0);
   glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 
@@ -85,8 +85,8 @@ void Quad::cuda_init(float* data) {
 void Quad::render() {
   glBindTexture(GL_TEXTURE_2D, 0);
   this->renderer->render(); 
-  glBindBuffer(GL_PIXEL_UNPACK_BUFFER, this->PBO);
   glBindTexture(GL_TEXTURE_2D, this->tex);
+  glBindBuffer(GL_PIXEL_UNPACK_BUFFER, this->PBO);
   glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, this->w, this->h, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
 };
 
diff --git a/src/illumination/FrameBuffer.cu b/src/illumination/FrameBuffer.cu
index f81af04..df4fe99 100644
--- a/src/illumination/FrameBuffer.cu
+++ b/src/illumination/FrameBuffer.cu
@@ -2,11 +2,7 @@
 #include "linalg/linalg.h"
 
 
-__host__ FrameBuffer::FrameBuffer(unsigned int w, unsigned int h) : w(w), h(h) {
-  this->buffer_size = w*h*sizeof(unsigned int);
-  cudaMalloc((void**)&this->buffer, this->buffer_size);
-  cudaMemset(this->buffer, 0, this->buffer_size);
-}
+__host__ FrameBuffer::FrameBuffer(unsigned int w, unsigned int h) : w(w), h(h) {}
 
 __device__ void FrameBuffer::writePixel(int x, int y, float r, float g, float b) {
   int i = y * this->w + x;
diff --git a/src/main.cu b/src/main.cu
index f232b3e..68bc172 100644
--- a/src/main.cu
+++ b/src/main.cu
@@ -14,6 +14,11 @@
 
 static float* d_volume = nullptr;
 
+// TODO: general
+// * pass camera_info to the raycasting function - updated according to glfw.
+// * on that note, code for handling input (mouse movement certainly, possibly free input / 4 pre-coded views, q/esc to quit, space for pause (would be were the 'simple' render idea would come in))
+// * very similarly - actual code for loading new data as the simulation progresses - right now its effectively a static image loader
+// 
 
 void getTemperature(std::vector<float>& temperatureData, int idx = 0) {
     std::string path = "data/trimmed";