The fix for this issue was from main menu go to 'settings' then pick 'video settings' then 'performance' and take fast render to 'off'
optifine version was OptiFine_1.7.10_HD_U_E7
I'm currently trying to mod 1.7.10 Java Edition Minecraft with LittleBlocks and Optifine for a pixelart timelapse.
Last time I opened my world it worked fine; no addition mods or anything changed between now and then.
Now the little blocks are entirely invisible when Optifine is enabled and I can't seem to do anything to reverse/refresh it.
Any help would be greatly appreciated.
Minecraft Version : 1.7.10
Forge Version : 1.7.10-Forge10.13.4.1614-1.7.10