setupTerrain will loop until (among other conditions) the chunksToUpdate set is
empty. However its size is never decreased during setupTerrain.
Having a (backwards) jump in time right before rendering the first frame would
reset the RenderGlobal due to the world change, leaving the chunksToUpdate set
empty to begin with and due to other changes, chunks are never inserted into it
during rendering (because they're always updated immediately).
The new screenshot feature and rendering a path that's in the future will not
trigger any world change, leaving the render process stuck in a life lock.
0ba5b0a Merge branch '1.8-shaders' into 1.8
e5eb982 Add Optifine compatibility to rendering by disabling their separate chunk loading queue Add compatibility to shaders that utilize the Shadow Map by manually setting displayListEntitiesDirty to false Call Shaders.beginRender in an Event Handler to avoid calling all of EntityRenderer#renderWorld
3a28c5b Draw the GuiVideoRenderer on a separate framebuffer that has the actual size of the window instead of MC's framebuffer which may have a different size
636ce7b Add compatibility for GLSL Shaders
92eb11a Change video preview to be compatible with Optifine
Add compatibility to shaders that utilize the Shadow Map by manually setting displayListEntitiesDirty to false
Call Shaders.beginRender in an Event Handler to avoid calling all of EntityRenderer#renderWorld
