It's my first all grain batch...
Here is a pic at 10 mins into the 90 min boil
Here's 35 minutes in
What is that particulate in the wort now?? Did I do something wrong?
Looks good to me. It could be bits of grain, but to me it looks like break material/proteins. That is normal. The fact that your wort is looking incredibly clear is a great sign.
That is hot break, mostly large proteins, it's perfectly normal You see this more pronounced in AG batches, as the hot break has already been done in your extract syrups or powders.