[Loot container in house_old_mansard_02 behind a 1000hp block]

A general rule of thumb we use is reward vs effort.  For example, lower tier hidden loot is usually hidden behind easily breakable blocks, while higher tier loot such as hidden stash crates will require more effort to get to (e.g. longer path, higher HP obstacles, etc.)

[Small Tree helper placed in "rwg_tile_gateway_cap" interferes with the POI part_trader_tile_filler_01 and creates 4 invisible blocks in the game.]

Confirmed, thanks. SDTD-16057