diff --git a/src/rendering/twn_gl_15_rendering.c b/src/rendering/twn_gl_15_rendering.c
index 7855414..35fe2c0 100644
--- a/src/rendering/twn_gl_15_rendering.c
+++ b/src/rendering/twn_gl_15_rendering.c
@@ -243,10 +243,9 @@ void use_texture_mode(TextureMode mode) {
 
 
 VertexBufferBuilder build_vertex_buffer(VertexBuffer buffer, size_t bytes) {
+    SDL_assert(bytes != 0);
     glBindBuffer(GL_ARRAY_BUFFER, buffer);
     glBufferData(GL_ARRAY_BUFFER, bytes, NULL, GL_STREAM_DRAW);
-    if (bytes == 0)
-        SDL_TriggerBreakpoint();
     void *mapping = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
     if (!mapping)
         CRY("build_vertex_buffer", "Error mapping a vertex array buffer");
@@ -282,8 +281,7 @@ void finally_render_sprites(const Primitive2D primitives[],
                             const struct SpriteBatch batch,
                             const VertexBuffer buffer)
 {
-    /* TODO: maybe do, dunno */
-    // glBindBuffer(GL_VERTEX_ARRAY, vertex_buffer);
+    (void)buffer;
 
     GLsizei off;
     GLsizei voff;
diff --git a/src/rendering/twn_gl_any_rendering.c b/src/rendering/twn_gl_any_rendering.c
index b7593c9..63071f9 100644
--- a/src/rendering/twn_gl_any_rendering.c
+++ b/src/rendering/twn_gl_any_rendering.c
@@ -70,6 +70,9 @@ void clear_draw_buffer(void) {
                  (1.0f / 255) * 230,
                  (1.0f / 255) * 230, 1);
 
+    /* TODO: don't clear color when skybox is applied? */
+    /*       for that window should match framebuffer */
+    /*       also it is driver dependent, from what i can gather */
     glClear(GL_COLOR_BUFFER_BIT |
             GL_DEPTH_BUFFER_BIT |
             GL_STENCIL_BUFFER_BIT);