1)  Feature request:  Added an "Add infinite plane" (at z=0) option to the background panel.  Mainly for use with the sun/sky black border issue.  As of right now it will use the always-written "def" shader with an RGB of 1 1 1.
1)  Feature request:  Added an "Add infinite plane" (at z=0) option to the background panel.  Mainly for use with the sun/sky black border issue.  As of right now it will use the always-written "def" shader with an RGB of 1 1 1.

2)  Increased the max value of the memory to 4096.

3)  Small cleanup to the irr cache global option code.

monkstone/sunflow,k-matsuzaki/sunflow,matheusabrantesgadelha/sunflow,fpsunflower/sunflow,fpsunflower/sunflow,k-matsuzaki/sunflow,fpsunflower/sunflow,matheusabrantesgadelha/sunflow,matheusabrantesgadelha/sunflow,k-matsuzaki/sunflow,matheusabrantesgadelha/sunflow,fpsunflower/sunflow,k-matsuzaki/sunflow,k-matsuzaki/sunflow,monkstone/sunflow,monkstone/sunflow,fpsunflower/sunflow,fpsunflower/sunflow,k-matsuzaki/sunflow,matheusabrantesgadelha/sunflow,monkstone/sunflow,matheusabrantesgadelha/sunflow,monkstone/sunflow