diff --git a/overviewer_core/rendermodes.py b/overviewer_core/rendermodes.py
index 0c988d2..2a58255 100644
--- a/overviewer_core/rendermodes.py
+++ b/overviewer_core/rendermodes.py
@@ -30,15 +30,30 @@ class RenderPrimitive(object):
             self.option_values[key] = val
 
 class Base(RenderPrimitive):
-    options = {
-        "edge_opacity": "darkness of the edge lines, from 0.0 to 1.0 (default: 0.15)",
-        "min_depth": "lowest level of blocks to render (default: 0)",
-        "max_depth": "highest level of blocks to render (default: 127)",
-        "height_fading": "darken or lighten blocks based on height (default: False)",
-        "nether": "if True, remove the roof of the map. Useful on nether maps. (defualt: False)",
-    }
     name = "base"
 
+class Nether(RenderPrimitive):
+    name = "nether"
+
+class HeightFading(RenderPrimitive):
+    name = "height-fading"
+    
+    black_color = Image.new("RGB", (24,24), (0,0,0))
+    white_color = Image.new("RGB", (24,24), (255,255,255))
+
+class Depth(RenderPrimitive):
+    name = "depth"
+    options = {
+        "min": "lowest level of blocks to render (default: 0)",
+        "max": "highest level of blocks to render (default: 127)",
+    }
+
+class EdgeLines(RenderPrimitive):
+    name = "edge-lines"
+    options = {
+        "opacity": "darkness of the edge lines, from 0.0 to 1.0 (default: 0.15)",
+    }
+
 # Render 3 blending masks for lighting
 # first is top (+Z), second is left (-X), third is right (+Y)
 def generate_facemasks():
@@ -70,8 +85,6 @@ def generate_facemasks():
     
     return (top, left, right)
 facemasks = generate_facemasks()
-black_color = Image.new("RGB", (24,24), (0,0,0))
-white_color = Image.new("RGB", (24,24), (255,255,255))
 
 # Render 128 different color images for color coded depth blending in cave mode
 def generate_depthcolors():
diff --git a/overviewer_core/src/primitives/base.c b/overviewer_core/src/primitives/base.c
index 2ed70fc..4f13c47 100644
--- a/overviewer_core/src/primitives/base.c
+++ b/overviewer_core/src/primitives/base.c
@@ -26,49 +26,12 @@ typedef struct {
     PyObject *grasscolor, *foliagecolor, *watercolor;
     /* biome-compatible grass/leaf textures */
     PyObject *grass_texture;
-    
-    /* black and white colors for height fading */
-    PyObject *black_color, *white_color;
-    
-    float edge_opacity;
-    unsigned int min_depth;
-    unsigned int max_depth;
-    int height_fading;
-    int nether;
 } PrimitiveBase;
 
 static int
 base_start(void *data, RenderState *state, PyObject *support) {
     PrimitiveBase *self = (PrimitiveBase *)data;
     
-    /* load up the given options, first */
-    
-    self->edge_opacity = 0.15;
-    if (!render_mode_parse_option(support, "edge_opacity", "f", &(self->edge_opacity)))
-        return 1;
-    
-    self->min_depth = 0;
-    if (!render_mode_parse_option(support, "min_depth", "I", &(self->min_depth)))
-        return 1;
-
-    self->max_depth = 127;
-    if (!render_mode_parse_option(support, "max_depth", "I", &(self->max_depth)))
-        return 1;
-
-    self->height_fading = 0;
-    /* XXX skip height fading */
-    /*if (!render_mode_parse_option(support, "height_fading", "i", &(self->height_fading)))
-      return 1;*/
-    
-    self->nether = 0;
-    if (!render_mode_parse_option(support, "nether", "i", &(self->nether)))
-        return 1;
-    
-    /*if (self->height_fading) {
-        self->black_color = PyObject_GetAttrString(state->chunk, "black_color");
-        self->white_color = PyObject_GetAttrString(state->chunk, "white_color");
-        }*/
-    
     /* biome-compliant grass mask (includes sides!) */
     self->grass_texture = PyObject_GetAttrString(state->textures, "biome_grass_texture");
 
@@ -123,8 +86,6 @@ base_finish(void *data, RenderState *state) {
     Py_XDECREF(self->grasscolor);
     Py_XDECREF(self->watercolor);
     Py_XDECREF(self->grass_texture);
-    Py_XDECREF(self->black_color);
-    Py_XDECREF(self->white_color);
 }
 
 static int
@@ -146,30 +107,6 @@ static int
 base_hidden(void *data, RenderState *state, int x, int y, int z) {
     PrimitiveBase *self = (PrimitiveBase *)data;
     
-    if (z > self->max_depth || z < self->min_depth) {
-        return 1;
-    }
-    
-    if (self->nether)
-    {
-        
-        /* hide all blocks above all air blocks */
-        int below_air = 0;
-        
-        while (z < 128)
-        {
-            if (getArrayByte3D(state->blocks, x, y, z) == 0)
-            {
-                below_air = 1;
-                break;
-            }
-            z++;
-        }
-        
-        if (!below_air)
-            return 1;
-    }
-
     return 0;
 }
 
@@ -319,65 +256,6 @@ base_draw(void *data, RenderState *state, PyObject *src, PyObject *mask, PyObjec
         if (facemask)
             tint_with_mask(state->img, r, g, b, 255, facemask, state->imgx, state->imgy, 0, 0);
     }
-    
-    if (self->height_fading) {
-        /* do some height fading */
-        PyObject *height_color = self->white_color;
-        /* negative alpha => darkness, positive => light */
-        float alpha = (1.0 / (1 + expf((70 - state->z) / 11.0))) * 0.6 - 0.55;
-        
-        if (alpha < 0.0) {
-            alpha *= -1;
-            height_color = self->black_color;
-        }
-        
-        alpha_over_full(state->img, height_color, mask_light, alpha, state->imgx, state->imgy, 0, 0);
-    }
-    
-
-    /* Draw some edge lines! */
-    // draw.line(((imgx+12,imgy+increment), (imgx+22,imgy+5+increment)), fill=(0,0,0), width=1)
-    if (state->block == 44 || state->block == 78 || !is_transparent(state->block)) {
-        Imaging img_i = imaging_python_to_c(state->img);
-        unsigned char ink[] = {0, 0, 0, 255 * self->edge_opacity};
-
-        int increment=0;
-        if (state->block == 44)  // half-step
-            increment=6;
-        else if ((state->block == 78) || (state->block == 93) || (state->block == 94)) // snow, redstone repeaters (on and off)
-            increment=9;
-
-        if ((state->x == 15) && (state->up_right_blocks != Py_None)) {
-            unsigned char side_block = getArrayByte3D(state->up_right_blocks, 0, state->y, state->z);
-            if (side_block != state->block && is_transparent(side_block)) {
-                ImagingDrawLine(img_i, state->imgx+12, state->imgy+1+increment, state->imgx+22+1, state->imgy+5+1+increment, &ink, 1);
-                ImagingDrawLine(img_i, state->imgx+12, state->imgy+increment, state->imgx+22+1, state->imgy+5+increment, &ink, 1);
-            }
-        } else if (state->x != 15) {
-            unsigned char side_block = getArrayByte3D(state->blocks, state->x+1, state->y, state->z);
-            if (side_block != state->block && is_transparent(side_block)) {
-                ImagingDrawLine(img_i, state->imgx+12, state->imgy+1+increment, state->imgx+22+1, state->imgy+5+1+increment, &ink, 1);
-                ImagingDrawLine(img_i, state->imgx+12, state->imgy+increment, state->imgx+22+1, state->imgy+5+increment, &ink, 1);
-            }
-        }
-        // if y != 0 and blocks[x,y-1,z] == 0
-
-        // chunk boundries are annoying
-        if ((state->y == 0) && (state->up_left_blocks != Py_None)) {
-            unsigned char side_block = getArrayByte3D(state->up_left_blocks, state->x, 15, state->z);
-            if (side_block != state->block && is_transparent(side_block)) {
-                ImagingDrawLine(img_i, state->imgx, state->imgy+6+1+increment, state->imgx+12+1, state->imgy+1+increment, &ink, 1);
-                ImagingDrawLine(img_i, state->imgx, state->imgy+6+increment, state->imgx+12+1, state->imgy+increment, &ink, 1);
-            }
-        } else if (state->y != 0) {
-            unsigned char side_block = getArrayByte3D(state->blocks, state->x, state->y-1, state->z);
-            if (side_block != state->block && is_transparent(side_block)) {
-                // draw.line(((imgx,imgy+6+increment), (imgx+12,imgy+increment)), fill=(0,0,0), width=1)
-                ImagingDrawLine(img_i, state->imgx, state->imgy+6+1+increment, state->imgx+12+1, state->imgy+1+increment, &ink, 1);
-                ImagingDrawLine(img_i, state->imgx, state->imgy+6+increment, state->imgx+12+1, state->imgy+increment, &ink, 1);
-            }
-        }
-    }
 }
 
 RenderPrimitiveInterface primitive_base = {
diff --git a/overviewer_core/src/primitives/depth.c b/overviewer_core/src/primitives/depth.c
new file mode 100644
index 0000000..4a2899c
--- /dev/null
+++ b/overviewer_core/src/primitives/depth.c
@@ -0,0 +1,56 @@
+/* 
+ * This file is part of the Minecraft Overviewer.
+ *
+ * Minecraft Overviewer is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * Minecraft Overviewer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with the Overviewer.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../overviewer.h"
+
+typedef struct {
+    unsigned int min;
+    unsigned int max;
+} PrimitiveDepth;
+
+static int
+depth_start(void *data, RenderState *state, PyObject *support) {
+    PrimitiveDepth *self = (PrimitiveDepth *)data;
+    
+    self->min = 0;
+    if (!render_mode_parse_option(support, "min", "I", &(self->min)))
+        return 1;
+
+    self->max = 127;
+    if (!render_mode_parse_option(support, "max", "I", &(self->max)))
+        return 1;
+
+    return 0;
+}
+
+static int
+depth_hidden(void *data, RenderState *state, int x, int y, int z) {
+    PrimitiveDepth *self = (PrimitiveDepth *)data;
+    if (z > self->max || z < self->min) {
+        return 1;
+    }
+    return 0;
+}
+
+RenderPrimitiveInterface primitive_depth = {
+    "depth", sizeof(PrimitiveDepth),
+    depth_start,
+    NULL,
+    NULL,
+    depth_hidden,
+    NULL,
+};
diff --git a/overviewer_core/src/primitives/edge-lines.c b/overviewer_core/src/primitives/edge-lines.c
new file mode 100644
index 0000000..54b7407
--- /dev/null
+++ b/overviewer_core/src/primitives/edge-lines.c
@@ -0,0 +1,90 @@
+/* 
+ * This file is part of the Minecraft Overviewer.
+ *
+ * Minecraft Overviewer is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * Minecraft Overviewer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with the Overviewer.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../overviewer.h"
+
+typedef struct {
+    float opacity;
+} PrimitiveEdgeLines;
+
+static int
+edge_lines_start(void *data, RenderState *state, PyObject *support) {
+    PrimitiveEdgeLines *self = (PrimitiveEdgeLines *)data;
+    
+    self->opacity = 0.15;
+    if (!render_mode_parse_option(support, "opacity", "f", &(self->opacity)))
+        return 1;
+    return 0;
+}
+
+static void
+edge_lines_draw(void *data, RenderState *state, PyObject *src, PyObject *mask, PyObject *mask_light) {
+    PrimitiveEdgeLines *self = (PrimitiveEdgeLines *)data;
+
+    /* Draw some edge lines! */
+    // draw.line(((imgx+12,imgy+increment), (imgx+22,imgy+5+increment)), fill=(0,0,0), width=1)
+    if (state->block == 44 || state->block == 78 || !is_transparent(state->block)) {
+        Imaging img_i = imaging_python_to_c(state->img);
+        unsigned char ink[] = {0, 0, 0, 255 * self->opacity};
+
+        int increment=0;
+        if (state->block == 44)  // half-step
+            increment=6;
+        else if ((state->block == 78) || (state->block == 93) || (state->block == 94)) // snow, redstone repeaters (on and off)
+            increment=9;
+
+        if ((state->x == 15) && (state->up_right_blocks != Py_None)) {
+            unsigned char side_block = getArrayByte3D(state->up_right_blocks, 0, state->y, state->z);
+            if (side_block != state->block && is_transparent(side_block)) {
+                ImagingDrawLine(img_i, state->imgx+12, state->imgy+1+increment, state->imgx+22+1, state->imgy+5+1+increment, &ink, 1);
+                ImagingDrawLine(img_i, state->imgx+12, state->imgy+increment, state->imgx+22+1, state->imgy+5+increment, &ink, 1);
+            }
+        } else if (state->x != 15) {
+            unsigned char side_block = getArrayByte3D(state->blocks, state->x+1, state->y, state->z);
+            if (side_block != state->block && is_transparent(side_block)) {
+                ImagingDrawLine(img_i, state->imgx+12, state->imgy+1+increment, state->imgx+22+1, state->imgy+5+1+increment, &ink, 1);
+                ImagingDrawLine(img_i, state->imgx+12, state->imgy+increment, state->imgx+22+1, state->imgy+5+increment, &ink, 1);
+            }
+        }
+        // if y != 0 and blocks[x,y-1,z] == 0
+
+        // chunk boundries are annoying
+        if ((state->y == 0) && (state->up_left_blocks != Py_None)) {
+            unsigned char side_block = getArrayByte3D(state->up_left_blocks, state->x, 15, state->z);
+            if (side_block != state->block && is_transparent(side_block)) {
+                ImagingDrawLine(img_i, state->imgx, state->imgy+6+1+increment, state->imgx+12+1, state->imgy+1+increment, &ink, 1);
+                ImagingDrawLine(img_i, state->imgx, state->imgy+6+increment, state->imgx+12+1, state->imgy+increment, &ink, 1);
+            }
+        } else if (state->y != 0) {
+            unsigned char side_block = getArrayByte3D(state->blocks, state->x, state->y-1, state->z);
+            if (side_block != state->block && is_transparent(side_block)) {
+                // draw.line(((imgx,imgy+6+increment), (imgx+12,imgy+increment)), fill=(0,0,0), width=1)
+                ImagingDrawLine(img_i, state->imgx, state->imgy+6+1+increment, state->imgx+12+1, state->imgy+1+increment, &ink, 1);
+                ImagingDrawLine(img_i, state->imgx, state->imgy+6+increment, state->imgx+12+1, state->imgy+increment, &ink, 1);
+            }
+        }
+    }
+}
+
+RenderPrimitiveInterface primitive_edge_lines = {
+    "edge-lines", sizeof(PrimitiveEdgeLines),
+    edge_lines_start,
+    NULL,
+    NULL,
+    NULL,
+    edge_lines_draw,
+};
diff --git a/overviewer_core/src/primitives/height-fading.c b/overviewer_core/src/primitives/height-fading.c
new file mode 100644
index 0000000..589111e
--- /dev/null
+++ b/overviewer_core/src/primitives/height-fading.c
@@ -0,0 +1,68 @@
+/* 
+ * This file is part of the Minecraft Overviewer.
+ *
+ * Minecraft Overviewer is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * Minecraft Overviewer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with the Overviewer.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../overviewer.h"
+
+typedef struct {
+    PyObject *black_color;
+    PyObject *white_color;
+} PrimitiveHeightFading;
+
+static int
+height_fading_start(void *data, RenderState *state, PyObject *support) {
+    PrimitiveHeightFading *self = (PrimitiveHeightFading *)data;
+    
+    self->black_color = PyObject_GetAttrString(support, "black_color");
+    self->white_color = PyObject_GetAttrString(support, "white_color");
+    
+    return 0;
+}
+
+static void
+height_fading_finish(void *data, RenderState *state) {
+    PrimitiveHeightFading *self = (PrimitiveHeightFading *)data;
+
+    Py_DECREF(self->black_color);
+    Py_DECREF(self->white_color);
+}
+
+static void
+height_fading_draw(void *data, RenderState *state, PyObject *src, PyObject *mask, PyObject *mask_light) {
+    PrimitiveHeightFading *self = (PrimitiveHeightFading *)data;
+
+    /* do some height fading */
+    PyObject *height_color = self->white_color;
+
+    /* negative alpha => darkness, positive => light */
+    float alpha = (1.0 / (1 + expf((70 - state->z) / 11.0))) * 0.6 - 0.55;
+    
+    if (alpha < 0.0) {
+        alpha *= -1;
+        height_color = self->black_color;
+    }
+    
+    alpha_over_full(state->img, height_color, mask_light, alpha, state->imgx, state->imgy, 0, 0);
+}
+
+RenderPrimitiveInterface primitive_height_fading = {
+    "height-fading", sizeof(PrimitiveHeightFading),
+    height_fading_start,
+    height_fading_finish,
+    NULL,
+    NULL,
+    height_fading_draw,
+};
diff --git a/overviewer_core/src/primitives/nether.c b/overviewer_core/src/primitives/nether.c
new file mode 100644
index 0000000..3844d1c
--- /dev/null
+++ b/overviewer_core/src/primitives/nether.c
@@ -0,0 +1,42 @@
+/* 
+ * This file is part of the Minecraft Overviewer.
+ *
+ * Minecraft Overviewer is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * Minecraft Overviewer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with the Overviewer.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../overviewer.h"
+
+static int
+nether_hidden(void *data, RenderState *state, int x, int y, int z) {
+    /* hide all blocks above all air blocks */
+    while (z < 128)
+    {
+        if (getArrayByte3D(state->blocks, x, y, z) == 0)
+        {
+            return 0;
+            break;
+        }
+        z++;
+    }
+    return 1;
+}
+
+RenderPrimitiveInterface primitive_nether = {
+    "nether", 0,
+    NULL,
+    NULL,
+    NULL,
+    nether_hidden,
+    NULL,
+};
diff --git a/overviewer_core/src/rendermodes.c b/overviewer_core/src/rendermodes.c
index fe69983..3e75073 100644
--- a/overviewer_core/src/rendermodes.c
+++ b/overviewer_core/src/rendermodes.c
@@ -20,12 +20,20 @@
 #include <stdarg.h>
 
 extern RenderPrimitiveInterface primitive_base;
+extern RenderPrimitiveInterface primitive_nether;
+extern RenderPrimitiveInterface primitive_height_fading;
+extern RenderPrimitiveInterface primitive_depth;
+extern RenderPrimitiveInterface primitive_edge_lines;
 
 /* list of all render primitives, ending in NULL
    all of these will be available to the user, so DON'T include primitives
    that are only useful as a base for other primitives. */
 static RenderPrimitiveInterface *render_primitives[] = {
     &primitive_base,
+    &primitive_nether,
+    &primitive_height_fading,
+    &primitive_depth,
+    &primitive_edge_lines,
     //&rendermode_lighting,
     //&rendermode_smooth_lighting,
     //&rendermode_cave,
@@ -59,25 +67,29 @@ RenderPrimitive *render_primitive_create(PyObject *prim, RenderState *state) {
     Py_DECREF(pyname);
 
     if (iface == NULL)
-        return NULL;
+        return (RenderPrimitive *)PyErr_Format(PyExc_RuntimeError, "invalid primitive name: %s", name);
     
     ret = calloc(1, sizeof(RenderPrimitive));
     if (ret == NULL) {
         return (RenderPrimitive *)PyErr_Format(PyExc_RuntimeError, "Failed to alloc a render primitive");
     }
     
-    ret->primitive = calloc(1, iface->data_size);
-    if (ret->primitive == NULL) {
-        free(ret);
-        return (RenderPrimitive *)PyErr_Format(PyExc_RuntimeError, "Failed to alloc render primitive data");
+    if (iface->data_size > 0) {
+        ret->primitive = calloc(1, iface->data_size);
+        if (ret->primitive == NULL) {
+            free(ret);
+            return (RenderPrimitive *)PyErr_Format(PyExc_RuntimeError, "Failed to alloc render primitive data");
+        }
     }
     
     ret->iface = iface;
     
-    if (iface->start(ret->primitive, state, prim)) {
-        free(ret->primitive);
-        free(ret);
-        return NULL;
+    if (iface->start) {
+        if (iface->start(ret->primitive, state, prim)) {
+            free(ret->primitive);
+            free(ret);
+            return NULL;
+        }
     }
     
     return ret;
@@ -120,8 +132,12 @@ void render_mode_destroy(RenderMode *self) {
         /* we may be destroying a half-constructed mode, so we need this
            check */
         if (prim) {
-            prim->iface->finish(prim->primitive, self->state);
-            free(prim->primitive);
+            if (prim->iface->finish) {
+                prim->iface->finish(prim->primitive, self->state);
+            }
+            if (prim->primitive) {
+                free(prim->primitive);
+            }
             free(prim);
         }
     }
@@ -134,7 +150,10 @@ int render_mode_occluded(RenderMode *self, int x, int y, int z) {
     int occluded = 0;
     for (i = 0; i < self->num_primitives; i++) {
         RenderPrimitive *prim = self->primitives[i];
-        occluded |= prim->iface->occluded(prim->primitive, self->state, x, y, z);
+        if (prim->iface->occluded) {
+            occluded |= prim->iface->occluded(prim->primitive, self->state, x, y, z);
+        }
+        
         if (occluded)
             return occluded;
     }
@@ -146,7 +165,10 @@ int render_mode_hidden(RenderMode *self, int x, int y, int z) {
     int hidden = 0;
     for (i = 0; i < self->num_primitives; i++) {
         RenderPrimitive *prim = self->primitives[i];
-        hidden |= prim->iface->hidden(prim->primitive, self->state, x, y, z);
+        if (prim->iface->hidden) {
+            hidden |= prim->iface->hidden(prim->primitive, self->state, x, y, z);
+        }
+        
         if (hidden)
             return hidden;
     }
@@ -157,7 +179,9 @@ void render_mode_draw(RenderMode *self, PyObject *img, PyObject *mask, PyObject
     unsigned int i;
     for (i = 0; i < self->num_primitives; i++) {
         RenderPrimitive *prim = self->primitives[i];
-        prim->iface->draw(prim->primitive, self->state, img, mask, mask_light);
+        if (prim->iface->draw) {
+            prim->iface->draw(prim->primitive, self->state, img, mask, mask_light);
+        }
     }
 }
 
diff --git a/setup.py b/setup.py
index ef01ea4..3c82fc2 100755
--- a/setup.py
+++ b/setup.py
@@ -151,7 +151,7 @@ except Exception:
 # used to figure out what files to compile
 #render_modes = ['normal', 'lighting', 'smooth-lighting', 'cave']
 #render_modes += ['overlay', 'spawn', 'mineral']
-primitives = ['base',]
+primitives = ['base', 'nether', 'height-fading', 'depth', 'edge-lines']
 
 c_overviewer_files = ['main.c', 'composite.c', 'iterate.c', 'endian.c', 'rendermodes.c']
 c_overviewer_files += map(lambda mode: 'primitives/%s.c' % (mode,), primitives)