Wirilome

I asked my kid and he told me what it was. He put a campfire under a sand block in the mine pool (it's a big natural waterfall, quite nice). Anyway, the smoke from the campfire goes through the sand and the water and makes a true white particle glitch on my screen. Torches do that too (when there's too many of them I think)

Hello, I have the exact same problem. I installed forge two days ago (version 15.1, the last one at the time, aka 30.0.19) and as soon as I installed it, I had particles glitching every time I harvest something. Only mod I have is Useful Backpacks by HyCraftHD. I found out a source of my glitch in my mine, a column of white smoke/bubbles coming out of a white block in the middle of a pool (below water), no clue what it is. It seems the torches and smoke are the things I saw all evening while I was mining, every time I had something entering my inventory while looking in the right direction. It's weird (and too late for me to post more details).