I´m working on a project, that I recently declared as completed - by far not perfect but finished for me as a bloody beginner. The last days I thought it might be worth being improved. I basically rebuilt the whole scene and made some testrenders every now and then. One day cycles renders came out much darker than before and I don´t know why. I think I messed up some render settings, but I can´t find the suspect. Here is a testrender from when it all was good and bright:
Then I added some objects and the renders got by far darker. Perhaps I also changed some settings, but I definitely can´t say which. After trying to clean up the mess I now get this result:
These images were made with an HDRI strength of 150. Even when I rise the strength to 10000 it doesn´t get much brighter.
Any ideas what could be wrong with my settings?
Thank you for your help!