diff --git a/src/main/java/me/cortex/voxy/client/core/rendering/util/HiZBuffer.java b/src/main/java/me/cortex/voxy/client/core/rendering/util/HiZBuffer.java
index 4616dfdd..0cb5b79d 100644
--- a/src/main/java/me/cortex/voxy/client/core/rendering/util/HiZBuffer.java
+++ b/src/main/java/me/cortex/voxy/client/core/rendering/util/HiZBuffer.java
@@ -69,12 +69,12 @@ public class HiZBuffer {
     }
 
     public void buildMipChain(int srcDepthTex, int width, int height) {
-        if (this.width != Integer.highestOneBit(width*2) || this.height != Integer.highestOneBit(height*2)) {
+        if (this.width != Integer.highestOneBit(width) || this.height != Integer.highestOneBit(height)) {
             if (this.texture != null) {
                 this.texture.free();
                 this.texture = null;
             }
-            this.alloc(Integer.highestOneBit(width*2), Integer.highestOneBit(height*2));
+            this.alloc(Integer.highestOneBit(width), Integer.highestOneBit(height));
         }
         glBindVertexArray(RenderService.STATIC_VAO);
         int boundFB = GL11.glGetInteger(GL_DRAW_FRAMEBUFFER_BINDING);
@@ -86,26 +86,19 @@ public class HiZBuffer {
         glEnable(GL_DEPTH_TEST);
 
 
-        //System.err.println("SRC: " + GlTexture.getRawTextureType(srcDepthTex) + " DST: " + this.texture.id);
-        glCopyImageSubData(srcDepthTex, GL_TEXTURE_2D, 0,0,0,0,
-                this.texture.id, GL_TEXTURE_2D, 0,0,0,0,
-                width, height, 1);
-
-
         glBindTextureUnit(0, srcDepthTex);
         glBindSampler(0, this.sampler);
         glUniform1i(0, 0);
         int cw = this.width;
         int ch = this.height;
-        glViewport(0, 0, cw, ch);
-        for (int i = 0; i < this.levels-1; i++) {
-            glTextureParameteri(this.texture.id, GL_TEXTURE_BASE_LEVEL, i);
-            glTextureParameteri(this.texture.id, GL_TEXTURE_MAX_LEVEL, i);
-            this.fb.bind(GL_DEPTH_ATTACHMENT, this.texture, i+1);
-            cw = Math.max(cw/2, 1); ch = Math.max(ch/2, 1); glViewport(0, 0, cw, ch);
+        for (int i = 0; i < this.levels; i++) {
+            this.fb.bind(GL_DEPTH_ATTACHMENT, this.texture, i);
+            glViewport(0, 0, cw, ch); cw = Math.max(cw/2, 1); ch = Math.max(ch/2, 1);
             glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
             glTextureBarrier();
             glMemoryBarrier(GL_FRAMEBUFFER_BARRIER_BIT|GL_TEXTURE_FETCH_BARRIER_BIT);
+            glTextureParameteri(this.texture.id, GL_TEXTURE_BASE_LEVEL, i);
+            glTextureParameteri(this.texture.id, GL_TEXTURE_MAX_LEVEL, i);
             if (i==0) {
                 glBindTextureUnit(0, this.texture.id);
             }
diff --git a/src/main/resources/assets/voxy/shaders/lod/hierarchical/screenspace.glsl b/src/main/resources/assets/voxy/shaders/lod/hierarchical/screenspace.glsl
index 3e8acb38..167e4db1 100644
--- a/src/main/resources/assets/voxy/shaders/lod/hierarchical/screenspace.glsl
+++ b/src/main/resources/assets/voxy/shaders/lod/hierarchical/screenspace.glsl
@@ -131,7 +131,7 @@ bool outsideFrustum() {
 }
 
 bool isCulledByHiz() {
-    vec2 asize = size * vec2(screenW, screenH);
+    vec2 asize = size * vec2(1024, 512);
     float miplevel = log2(max(max(asize.x, asize.y),1));
 
     //TODO: make a path for if the miplevel would result in the textureSampler sampling a size of 1
@@ -140,14 +140,12 @@ bool isCulledByHiz() {
     miplevel = floor(miplevel)-1;
     miplevel = clamp(miplevel, 0, textureQueryLevels(hizDepthSampler)-1);
 
-    vec2 midpoint = (maxBB.xy + minBB.xy)*0.5f;
-
     float testAgainst = minBB.z;
     //the *2.0f-1.0f converts from the 0->1 range to -1->1 range that depth is in (not having this causes tighter bounds, but causes culling issues in caves)
     //testAgainst = testAgainst*2.0f-1.0f;
 
-    int ml = 4;//int(miplevel);
-    ivec2 msize = ivec2(128,64);//textureSize(hizDepthSampler, ml);//max(ivec2(1),ivec2(screenW, screenH)>>ml);
+    int ml = int(miplevel);
+    ivec2 msize = textureSize(hizDepthSampler, ml);//max(ivec2(1),ivec2(screenW, screenH)>>ml);
     ivec2 mxbb = clamp(ivec2(maxBB.xy*msize), ivec2(0), msize);
     ivec2 mnbb = clamp(ivec2(minBB.xy*msize), ivec2(0), msize);
     float pointSample = -1.0f;
@@ -173,11 +171,8 @@ bool isCulledByHiz() {
     //if ((culled) && node22.lodLevel == 0) {
     //    printf("HiZ sample point: (%f,%f)@%f against %f, value %f", midpoint.x, midpoint.y, miplevel, minBB.z, textureLod(hizDepthSampler, vec3(0.5f,0.5f, 0.000000001f), 9.0f));
     //}
-    if (pointSample==0.0f) {
-        //return false;
-    }
 
-    return pointSample<testAgainst;
+    return pointSample<=testAgainst;
 }