This tutorial is set by the author's setting without permission.

These three mines naturally need to change the configuration file

The first step is to open the .minecraft folder (if your MC has a version isolation, open the Versions, and then open the corresponding archive of the file you want to change.

Step 2 Open the config folder

Step 3 Open COFH

Step 4 Open the worldd

Step 5 Open the file 01_thermalfoundation_ores.json, you can open it with a notepad

Step 6 Find Platinum, this is platinum, change the following line of FALSE to TRUE

Step in the seventh step to find aluminum, this is aluminum, the same reason as above is changed to T.

Step 8 finds Iridium, this is a puppet, and it is also changed to TRUE

OK, changed to, these three mines will naturally generate

Then lift a mouth, the platinum ore is generated at 5-25 layers, the aluminum is 40-75, and the 铱 is 5-25.

Also, I used 1.12.2, the high version is unclear whether this is the case, but it should be the same