HOW TO BUILD REMOTE CONTROL DOOM STYLE DOORS  

• First build two large sectors (rooms), joined together by a smaller sector (door)
• Split the door sector lengthwise into three sectors,
• tag the middle sector (press " T ") 20, the tag should read 0,20
• 
• The middle sector is shown above where the white arrow is
• Go to 3D mode (press " ENTER " on the keypad)
• Raise ceilings and place textures as shown below
• 
• In the middle of the door sector place these sprites :-
• 1 - SECTOREFFECTOR or SE - sprite #1
• 1 - ACTIVATOR or A - sprite #2
• 1 - MUSIC&SFX or M - sprite # 5
• 1 - GSPEED or GS - sprite # 10
• Place 1 switch (ie ,tilenumber 136) on each side of the door sector
• Go back to 2D mode
• Tag sprites by pressing ALT + H (hi-tag) or ALT + T (lo-tag)
• Tag the SE sprite  hi tag - 100 / lo tag - channel ( ie, 80)
• Tag the A sprite hi tag - 0 / lo tag - channel (ie, 80)
• Tag the M sprite hi tag - 167 / lo tag - 167
• Tag the GS sprite hi tag - 0 / lo tag - 88
• Tag the SWITCH sprites hi tag 0 / lo tag - channel (ie,80)
• Go back to 3D mode
• Left click on the ceiling of the door sector
• Press PGDOWN to lower the ceiling to the floor
• Congratulations!! ,you've made your door now test it
• Download the map featured in the screenshots TUTOR4.ZIP