I already made an unreal presentation for this garden design project.
For this picture i just used the model of the architecture and rendered it in 3ds max with vray 5.
Render Settings:
Brute force: primary engine
Light cache: secondary engine
Noise threshold: 0,005
3500 subdivs
Sample size 0,01
vray denoiser
GI: enable
Vraybitmap hdri image for GI environment
Same hdri for environment reflection/refraction
Render time:
19062.6 sec (318 minutes = 5,29 hours)
Computer: AMD Ryzen 7
3700X 8-Core Processor
16 gb RAM
For the garden animation with Unreal check; https://www.youtube.com/watch?v=CFf-_OUDJkI&t=157s
