What do I fill this with?

[trasker]

I'm in the process of converting an upper floor laundry room into a child's room.

The walls aren't completely straight everywhere, so there are decent gaps in the corners where the drywall meets.

What should I use to fill this in? Regular filler can be built up to a maximum of 5 mm, but this is sometimes more.

 

[huggan]

Gypsum filler first, but don't take too much because it doesn't settle and is hard to sand.

 

[trasker]

Great! I'll get that. Thank you very much!