Always felt like trees are too blocky? Wished for more well-rounded treetrunks? Don't want to get kicked off a server for modding the game?
Look no further!
As an extension to my own pack, I have created a resourcepack that makes sure those pesky logs are round, and look pretty in the process.
Just put this resourcepack in the resourcepacks folder, and in the game move it below any pack that you are using, and the logs will magically become more rounded!
Ask your pack creator to include a assets/minecraft/texture/roundtrunk/log_top.png for every treetype in the resourcepack for an even better look!
This should work for most versions of minecraft that support custom models, I have tested on 1.12.2 and up.