Affects Version/s: Minecraft 1.5, Minecraft 1.5.1, Snapshot 13w16a, Snapshot 13w16b, Minecraft 1.5.2, Snapshot 13w17a
Fix Version/s: Snapshot 13w18a
Environment:Windows 7 (64-bit)
Java 7u17 (64-bit) - 4096 MB RAM allocated to Minecraft
CPU: Intel Core I7-2600K
Graphics: Gainward GeForce GTX 570 Phantom (1,25 GB GDDR5)
RAM: 8 GB
If using a HD texturepack with 4096x4096 or larger cloud textures, the clouds are incorrectly rendered grayish-blue, cover the whole sky and have massive black stripes on them.
Using "clouds_2048_scuttles.png" (taken from Scuttles LB Photorealism), the clouds look as intended (apart from showing
MC-8779, see screenshot "img1.jpg").
Using "clouds_4096_scuttles.png" (doubled resolution), the clouds aren't properly rendered anymore (see screenshot "img2").
Installing MCPatcher on Minecraft 1.5.1 fixes the problem, so it's not a hardware issue !