diff --git a/examples/srtm.cpp b/examples/srtm.cpp
index b6623cb9..c3f81adf 100644
--- a/examples/srtm.cpp
+++ b/examples/srtm.cpp
@@ -40,7 +40,6 @@
 // TODO: fix frustum culling
 // TODO: fix seams at tile borders
 // TODO: try a different coordinate system for closer tiles
-// TODO: use closer near plane, maybe try reversed-Z
 // TODO: add space, stars, the sun
 // TODO: add atmospheric glow
 
@@ -439,6 +438,8 @@ uniform vec3 u_p2;
 uniform sampler1D u_colormap;
 uniform sampler1D u_colormap_neg;
 
+uniform float u_far;
+
 layout (location = 0) in float in_height;
 
 out vec3 color;
@@ -456,6 +457,8 @@ void main()
 	vec3 p = normalize(u_p0 * t0 + u_p1 * t1 + u_p2 * t2) * (1.0 + in_height / 6400000.0);
 	pos = p;
 	gl_Position = u_transform * vec4(p, 1.0);
+	float C = 1.0;
+	gl_Position.z = (2.0 * log(C * gl_Position.w + 1.0) / log(C * u_far + 1.0) - 1.0) * gl_Position.w;
 	color = (in_height > 0.0) ? texture(u_colormap, in_height / 8000.0).rgb : texture(u_colormap_neg, -in_height / 10000.0).rgb;
 })";
 
@@ -724,12 +727,14 @@ void srtm_app::present()
 	tile_close_program["u_light"] = geom::vector<float, 3>{0.f, 0.f, 1.f};
 	tile_close_program["u_colormap"] = 0;
 	tile_close_program["u_colormap_neg"] = 1;
+	tile_close_program["u_far"] = camera.far_clip;
 	tile_far_program.bind();
 	tile_far_program["u_transform"] = camera_transform;
 	tile_far_program["u_N"] = static_cast<int>(node_size);
 	tile_far_program["u_light"] = geom::vector<float, 3>{0.f, 0.f, 1.f};
 	tile_far_program["u_colormap"] = 0;
 	tile_far_program["u_colormap_neg"] = 1;
+	tile_far_program["u_far"] = camera.far_clip;
 	gl::ActiveTexture(gl::TEXTURE0);
 	color_map.bind();
 	gl::ActiveTexture(gl::TEXTURE1);