https://robertkeeley.com/Caverns
https://robertkeeley.com/DM+Drive
https://www.music-man.com/instruments/guitars/jp15
https://carlmartin.com/custom-shop-50/
Three reverb types, 650ms of warm delay with or without modulation, true or tail/buffered bypass and the ability to switch in each effect separately or together. The Caverns may well be the answer to your ambient dreams. It certainly sounded great at my place!
Guitar: 2017 Ernie Ball Music Man JP15-7 (stock).
Amp: Carl Martin Custom Shop 50
Extra effects: Keeley D&M Drive
Cables: Goodwood Audio and Providence
Power Supply: Strymon Zuma
Mic: sE V3 Dynamic and VR1 (https://www.seelectronics.com) (Vibrolux); Samson Airline77 (me)
Camera: Canon 60D (me) and Nikon D5100 (pedal)
Soundcard: AVID Mbox Pro 3 (for recording) & Fractal Audio Systems Axe-FX II XL+ (mixing and bouncing).
Computer: Apple iMac 27" i7 3.4 GHz 16 GB RAM
Software: Logic Pro X, Waves L3-16 Limiter (to keep levels in check at output), Apple Final Cut Pro X (video editing and Youtube compression).