FujiFilm X-T4 Owner's Manual page 346

Problem Problem
Pictures are mottled.
12
322
•
Shutter speed is slow and the ambient temperature is high: This
is normal and does not indicate a malfunction.
mapping (P 115).
* X-rays, cosmic rays, and other forms of radiation interacting
with the image sensor may cause bright spots of various col-
ors such as white, red, and blue. Pixel mapping helps reduce
the occurrence of such bright spots.
•
The camera has been used continuously at high temperatures:
Turn the camera off and wait for it to cool down (P 40,
330).
•
A temperature warning is displayed: Turn the camera off and
wait for it to cool down (P 40, 330).
Solution Solution
*
Use pixel