This is a really good mod. However, it uses the same key as the stamina mod, so when you try to sprint (I use the stamina mod). However, this mod lets you to change your offhand key to one of the other controls (I use the zoom key). There is a bug where if a liquid source block is sent to the offhand key, then you get softlocked (I assume that one can clear inventory manually to be able to play in the world again). Other than that, this is a great offhand mod! :D
Edit: The bug has been fixed. Thanks for the quick response! :)
About the key: The engine only gives us a single key that isn't already assigned to something. It's not like I have a choice which one to use.
You can, however, swap the stamina mod for minetest_wadsprint plus hbhunger as they offer a sprinting solution that doesn't require said key.
You can also go to your settings to change the hotkey of offhand to something else but it'd likely conflict with something else. See the forum discussion for more information.
I never experienced the texture bug before. If you send me a report either on the issue tracker or on the forum thread with your debug.txt then I'll be happy to resolve that.
I can't seem to reproduce the texture bug. I think it was a compatibility issue with the "What Is This? UwU" mod. Oh, and I found a new bug! The game crashes whenever I try to put a source block (like lava, not the bucket, the source block) into my offhand. I'll put the error on the fourm.
The texture bug happened again. I checked debug.txt, but I didn't find much, except for the errors, and a lot of warnings for some of my other mods.
Here's what I was doing: I was playing Minetest Survival. I placed down a torch in a cave (from the offhand), then quickly swapped it for my ladders, combined a stack of 90-ish and 3 torches, then swapped again. That's when the texture bug happened. I equiped my stone pickaxe, then I saw this error: ERROR[Main]: generateImage(): Could not load image "?(T@default)Stone Pickaxe?E" while building texture; Creating a dummy image
(I'll include a list of all the mods I was using at the time on the forum)