When opening a world I have created prior to the 0.17.0 beta, it changes the biomes of the whole world to random so ice and snow appear randomly while in other places snow melts and it looks like a checker board.
Linked issues
is duplicated by 4
MCPE-18212
Messed up all Terrain/Biomes when entering some of the the save world.
Resolved
MCPE-18232
Snow in the world 0.16
Resolved
MCPE-18289
Discoloured one block wide stripes of grass and leaves on trees aprox 4 or 5 blocks apart
Resolved
MCPE-18831
Grass blocks look different in swamp biome
Resolved
relates to 2
Attachments
Comments 4
I wrote mcpe_viz. While working on updating it to support the cubic chunks in 0.17, I discovered what looks like a nasty problem with respect to saving per-chunk biome and grass color. I believe this problem is the reason for this and related bugs.
The new LevelDB record 0x2d appears to store the following data for each column in each chunk:
The height of the top block as a 2-byte integer
The Biome (1-byte) and Grass Color (3-byte)
The 0x2d record currently has a length of 768 bytes. The "height" data consumes (16x16x2) 512 bytes. The Biome + Grass Color should consume (16x16x4) 1024 bytes. However, it appears that the 0x2f record currently only stores the first 4 rows of Biome + Grass Color (256 bytes).
Confirmed on tab pro.
new chunks visited after 0.17 do not seem affected. just chunks generated before 0.17. Or so i have found.
Confirmed on Samsung J7 2016.