From 39bea9a66ec53806c2a56a9c22c26d98cdfceae6 Mon Sep 17 00:00:00 2001
From: IntegratedQuantum <jahe788@gmail.com>
Date: Sun, 1 Jun 2025 15:05:18 +0200
Subject: [PATCH] Fix lossy chunk compression for transparent blocks

fixes #1565
---
 src/server/storage.zig | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/server/storage.zig b/src/server/storage.zig
index 93ef6d7a0..8e8a50fd5 100644
--- a/src/server/storage.zig
+++ b/src/server/storage.zig
@@ -293,8 +293,10 @@ pub const ChunkCompression = struct { // MARK: ChunkCompression
 			for(0..chunk.chunkVolume) |i| {
 				uncompressedData[i] = @intCast(ch.data.data.getValue(i));
 				if(allowLossy) {
-					const model = main.blocks.meshes.model(ch.data.palette[uncompressedData[i]]).model();
-					if(model.allNeighborsOccluded) {
+					const block = ch.data.palette[uncompressedData[i]];
+					const model = main.blocks.meshes.model(block).model();
+					const occluder = model.allNeighborsOccluded and !block.viewThrough();
+					if(occluder) {
 						solidMask[i >> 5] |= @as(u32, 1) << @intCast(i & 31);
 					} else {
 						solidMask[i >> 5] &= ~(@as(u32, 1) << @intCast(i & 31));