Had a bit of a headache this morning, soon shifted by a few cups of coffee. Working very hard on shaders again, another nine hour shift on that. Which was a shame as I was going to go out this evening. Walked the dogs. Lots of Amazon parcels arrived. Worked more. Got shafted by a nasty shader compiler bug. It was optimising things out of a structure when it shouldn’t have. Ended up going for a long run in the end. Not sure what’s happening the weekend, weather all over the place at the moment. Taking Jamie to the hospital tomorrow morning for his throat scan thing. They will start at the top chin and work done, the scanner thing will be like being on a roller coaster.