LG CX OLED users: how defeat autodimming of static images?

The internet backwash on this one is all muddle: you can/can't defeat it with the service remote, you can/can't defeat dimming with a cell app, the relevant service remote is/isn't available at Amazon, there's no way to defeat it and/or you void the warranty when you do, etc. etc. etc.
How do post houses who use this line for at least some display purposes handle it?
How do post houses who use this line for at least some display purposes handle it?