Emulator

Game Name?
Super Mario Galaxy 2

Game ID? (right click the game in the game list, properties, info tab)
SB4E01

MD5 Hash? (right click the game in the game list, properties, info tab, MD5 Hash: Compute)
9184ae461e09a279b871cf832497d8bf

What's the problem? Describe what went wrong.
Stuttering occurs only after first run when using CDAMJC's Super Mario Galaxy 2 HD Textures.

What steps will reproduce the problem?
Delete the shaders in Cache\Shaders\ directory
Run Super Mario Galaxy 2 in 1080p (DX11, 3x resolution, 8x MSAA, 16x AF, Ubershaders Exclusive Mode, Load Custom Textures). Prefetch Custom Textures can be ON or OFF for this stuttering.
The game will first precompile the shaders.
The game will go into the intro with no stuttering.
End emulation.
Re-run Super Mario Galaxy 2 with the exact same settings.
The game will stutter throughout the intro.

Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.
Yes, 5.0-5681

Is the issue present in the latest stable version?
Yes

What are your PC specifications?
CPU: Intel - Core i5-6600K 3.5GHz Quad-Core Processor
Memory: Corsair - Vengeance LPX 8GB (2 x 4GB) DDR4-3200 Memory
Storage: Samsung - 850 Pro Series 256GB 2.5" Solid State Drive
Video Card: EVGA - GeForce GTX 1060 6GB 6GB SSC GAMING Video Card
Operating System: Windows 10 - 64 bit

Is there anything else that can help developers narrow down the issue?
I have a feeling it's the load time of the HD textures. So when the game loads the first time, while the shaders are compiling, the textures get loaded. Is there a way to always delay the start of the game, while all the HD textures load?