Thanks.
So you just start rendering anything and then try entering values like 0.8 or 0.9 in the VFB? Where exactly are you entering them? In the tone mapping operator values? If not, can you please show a screenshot where you are entering them?
Also, is there any difference if you use comma or dot? 0.8 vs 0,8
And last question: what exactly happens if you try to enter those values? Does it change to 0 or 1? Or maybe you cannot type at all and nothing happens?