1.16.5, tested with mod versions 1.0.4 and 1.0.5.
Block textures are misaligned, specifically they seem to be stretched so that the first and last pixel are 1/2 width. This is with OptiFine and the Stay True texture pack, and seems to only affect blocks such as stone/dirt/gravel etc. which have random variants. I'm not sure the interaction between Lightspeed and textures, but removing Lightspeed fixes the issue for me. Cycling the connected textures setting in-game corrects the issue temporarily. I tried deleting the lightspeed-cache folder and regenerating to no avail.

1.16.5, tested with mod versions 1.0.4 and 1.0.5.
Block textures are misaligned, specifically they seem to be stretched so that the first and last pixel are 1/2 width. This is with OptiFine and the Stay True texture pack, and seems to only affect blocks such as stone/dirt/gravel etc. which have random variants. I'm not sure the interaction between Lightspeed and textures, but removing Lightspeed fixes the issue for me. Cycling the connected textures setting in-game corrects the issue temporarily. I tried deleting the lightspeed-cache folder and regenerating to no avail.