0x4B — BG_SEARCH

Resolves an animation name (mode arg&3: none, fixed four-word inline slot, or SCR_DATA+0x14), reads one float, and calls CBackGround::SetAnimationSpeed(name, arg>>4, speed). The inline path advances the cursor a fixed 0x10, corroborating the Command_45 name-slot layout.

proven— handler traced, and exercised by at least one shipped script.

At a glance

Opcode	`0x4B` (75)
Handler	`CRadiScript::Command_4b`
Signature	`CRadiScript::Command_4b(int,SCR_DATA*,unsigned int,unsigned int)`
Translation unit	`r_script_run4.cpp`
Address	— debug build; click for all 3
Handler size	`0x7C` (124 bytes)
Family	Background, map, landscape and camera
Command size	`4 + extra_words * 4` bytes

Handler behaviour

Encoding

The command header is one 32-bit word, as described in §3 Instruction encoding:

 31            24 23            16 15             8 7              0
+----------------+----------------+----------------+----------------+
|  flags         |  argument byte |  extra words   |  0x4B          |
+----------------+----------------+----------------+----------------+

Bits 8–15 give the number of 32-bit operand words that follow. Bits 16–23 are handed to the handler as a bitfield; on character commands bit 0 normally says whether a character selector word is present. Bit 31 is the keep-going bit.

Engine calls

Engine functions this handler was observed calling:

CBackGround::SetAnimationSpeed