The picture frame contains just one script that sends a link message to the root primitive main script requesting a texture and then displays the texture by UUID once the root main script sends a linked message back.

Ideally, the most basic operation of a picture frame in SL is to allow the user to drag and drop a picture onto the picture frame manually. However, since the entire build is completely attached to the avatar, even the wearing avatar is unable to drag and drop a picture such that the system of sending messages back and forth from the picture frame and the root has been chosen as the preferred way of operation.

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//  Copyright (C) Wizardry and Steamworks 2022 - License: GNU GPLv3      //
///////////////////////////////////////////////////////////////////////////
 
default {
    link_message(integer sender, integer num, string str, key id) {
        if(str == "display") {
            llSetTexture(id, ALL_SIDES);
            return;
        }
    }
 
    touch_start(integer num) {
        if(llDetectedKey(0) != llGetOwner()) {
            return;
        }
 
        llMessageLinked(LINK_SET, 0, "image", NULL_KEY);
    }
    attach(key id) {
        llResetScript();
    }
}