射影變換

射 = 寸 + 身 : Sherlock Holmes (sh) is ready for takeoff in the elevator's bathroom (e4) and stands in front of a rocket on a launch pad (mnemonic symbol for 射). As there are many journalists, Sherlock prepared to be extra fancy and wears a tight body suit (身). He winks to the photographers and makes the thumbs up (寸) sign.

影 = 彡 + 景 : Maud Younger (y) wants to watch a movie (影) inside of the engine ((e)ng3), but only men are allowed. She doesn't bounce back but instead, being a suffragist, puts on a long, fake Santa beard (彡). She enters to find that the whole movie consists of a still frame of a bonsai tree, a landscape in a pot. Back in the days, the script writers were not so experienced it seems.

变 = 亦 + 又 : In anthill's bathroom the also-ran is sparring with Brunhilde. In her mind she imagines changing into a boxing grizzly bear.

变 = 亦 + 又 : I think 变 does look like a grizzly bear with a beret. 又 is the snout, and the two eyes are the two strokes of 八.

换 = 奂 + 扌 : Helga Horse (hu) received two new toy claws (扌) and tests them in the anthill's bathroom (an4). To test whether they are the same, she repeatedly exchanges (换) them and weighs them in her hands. She then makes both tips of the claws touch and quietly whispers "excellent" (奂).