Problem with inverted layer and paintbrush

[AlfC]

I am trying to extend my use of Affinity Photo beyond the simple adjustments I have used so far. I have tried to copy the process described in the Live Filter Layers tutorial in which a filter (or adjustment) layer is inverted and then shown in selected areas of an image using the paintbrush tool. I have tried several layers - some filters, some adjustments, but the paintbrush has no effect in making the layer show through. I am sure I have copied the tutorial video carefully but cannot replicate the process. Help would be much appreciated on what must be a simple mistake somewhere.

[Gnobelix]

Hello AlfC,
put the paint brush from black to white (shotcut X).
I think,  then is your problem be solved.

Cheers

[AlfC]

In case anyone else has this problem, I eventually found that my blending mode was set to darken and this prevented the paintbrush having any effect... may be obvious to some but not to me. I guess the wider problem is that if you experiment with settings to see what happens and don't re-set when you close, then AP remembers the odd settings with unexpected consequences in some cases. Anyway, setting the blend mode to normal made the paintbrush work and revealed the inverted layer as expected.

[AlfC]

2 minutes ago, Gnobelix said:

Hello AlfC,
put the paint brush from black to white (shotcut X).
I think,  then is your problem be solved.

Cheers

Thanks for the reply Gnobelix. Posts coincided. In my case I had already checked that the paintbrush was set to white as this was mentioned in the tutorial. The blend mode wasn't mentioned though but seems to be important.