Sakura island blender render

Sakura Island is the spawn point in my minecraft server. Of course it would not be possible to place sakura trees in game, so what’s actually in Minecraft is pink wool. Nevertheless they still look nice from far away.

I tried water caustics with refraction and fresnel effects, which make water more realistic at the cost of increased samples and render time. Also I attempted a manual material override on tree leaves, However that seems worth it.

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Minecraft creation by me, exported with mineways on wine, rendered on blender with cuda. As usual, full resolution of 4096×4096 is available on pixiv.

Sakura Island At Night
Rendered in Blender

[Errata] Windows upgrade to 1703 broke grub

What happened?

After windows upgrading itself to release 1703 aka. the creator update, Grub bootloader can no longer start and says error: unknown filesystem and dropped in to grub rescue shell. Windows boots up fine from firmware memu.

TL; DR

Manually doing hexediting just taught me another valuable lesson: @Windows has the worst upgrade handling.

— @cth451 July 28, 2017

  1. Prepare a USB linux live environment.
  2. Find the correct partition number, it might have been changed during upgrade.
  3. Look for grubx64.efi in your EFI system partition and use a hex editor to open it
  4. Search for /boot/grub and notice the (,gptN) where N is your original partition number for linux OS.
  5. Change N to the new parition number, save the file and reboot.

Analysis

Before upgrade, my partition scheme was:

  • sda1 fat32: EFI system parition
  • sda2 ext4: Archlinux root filesystem
  • sda4 ntfs: Windows drive C
  • sda3 ext4: AOSC OS root filesystem

Partition numbers were not exactly in physical order of data, for I shrinked Archlinux to make room for Windows installation. However after upgrade, it became:

  • sda1 fat32: EFI system parition
  • sda2 ext4: Archlinux root filesystem
  • sda3: Windows drive C
  • sda4: Windows recovery environment
  • sda5: AOSC OS root filesystem

So what did windows do down there? It shrinked drive C and made a little recovery partition, then re-sorted the partition numbers. However grub bootloader looks for partitions by partition number. It tried parition 3 (which was a valid linux filesystem), but it’s an ntfs now.

This partition number is hardcoded into the bootloader efi image, so we need to manually hexedit it.

Self burn notice: Sina Weibo

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Hash: SHA256

近期由于新浪微博已经无法正常使用,我将不会在 Sat Jul 15 8:00am GMT+8 之后继续发布微博。
以防万一,在此声明此后的所有新微博、评论和私信均非本人所为。但是,我仍然会主动的维护关注及粉丝列表。

- -- cth451
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我将会陆续停用其他社交网络与新浪微博之间的连结,并且可能出现大量数据删除。感谢微博上不知名的各位在过去对一个普通学生的支持。

大阪

梅田

A photo of the Yodo-gawa (淀川) from the skyscrapers with the old DSLR Canon 50D. Juusou-suji (十三筋) and Hankyu railways are visible in this picture.

EXIF:
Camera   = Canon EOS 50D
Lens     = EF-S 17-85mm f/4-5.6 IS USM
ISO      = 100
Aperture = f/11
Exposure = 30"
Shot from 梅田スカイビル 空中庭園

天満橋

A shot of the only double decked bridge in Osaka. Taken with my Xperia Z5 on the cruise ship during sunset.

天満橋 Geotag: 小川

Cities of Minneapolis and Duluth plus wide angles

Minneapolis

First of all, the skyline of Minneapolis on MN-65 northbound. It is a beautiful city yet I haven’t post any shots of the city itself, so here is one.

Minneapolis City Skyline
Minneapolis City Skyline

The Minnehaha falls is within the city bound among private residences. Too young, too simple, sometimes naive. Continue reading Cities of Minneapolis and Duluth plus wide angles

Lake superior and sunset

Lake Superior – Sugarloaf Cove

Position: 47°29’11″N 90°58’59″W

Cobblestone underwater. Taken on sugarloaf cove beach with waterproof Xperia Z5.
Cobblestone underwater on sugarloaf cove beach with waterproof Xperia Z5.

I took this photo with the waterproof Xperia upside down with camera underwater. Not exactly what I expected but still amazing enough to see colorful cobblestone underwater.

Colorful cobblestones on the beach of Lake Superior
Colorful cobblestones on the beach of Lake Superior

Yet another regular collection of colorful stone beach.

Lake Mille Lacs

Position: 46°10’52″N 93°43’42″W

Lake Mille Lacs, partially frozen. Taken on a trail 2m from the shore.
Lake Mille Lacs, partially frozen. Taken on a trail 2m from the shore.

This one is pretty off-road on the side of a trail beyond Indians point. Cold, but beautiful.

Minnesota Route 1

Sunset on MN-1 westbound
Sunset on MN-1 westbound

Unfortunately I lost Geo-tag in this photo… So I don’t know the precise location on the road.