More efficient surface rendering!

Now, outside of sprites, every pixel on the screen is draw at most
once. Hoorah. Unfortunately things still seem to be a little slow,
perhaps its the z_buffer access or the fact that vertical floor slice
drawing is bad?

1 files changed, 0 insertions, 0 deletions

diff --git a/surfaces.png b/surfaces.png
new file mode 100644
index 0000000..f699b8b
--- /dev/null
+++ b/surfaces.png