• Setting mode to FALSE (or just leaving out ANIM_ON) will stop the previous animation.
• ROTATE and SCALE define two 'special' modes of the texture animation, and are mutually exclusive--they cannot be used together.
• ROTATE and SCALE interpret the animation parameters differently from the standard animation mode, and also from each other, as detailed below.

'Standard' Animation Mode

• x_frames defines the number of horizontal frames.
• y_frames defines the number of vertical frames.

• start specifies the frame number to begin animating from (frames are numbered from left to right, top to bottom, starting at 0).
• length specifies the total number of frames to animate ( setting length to 0 means animate all frames).

• rate sets the animation speed, in frames per second, eg. setting rate to 10.0 means ten frames per second.

• x_frames and y_frames are each limited to a range of 0 to 255, due to the fact that only the first byte of each integer is transmitted; the values transmitted are (x_frames & 0xFF) and (y_frames & 0xFF).
• The SMOOTH flag will cause the animation to scroll between the frames instead of jumping frame-by-frame. The frames will still be played in the normal sequence, however.
• Setting rate to a negative value is exactly equivalent to using a positive value and the REVERSE flag.
• Textures cannot be animated beyond a 1x1 tiling.

ROTATE Animation Mode

• start specifies the beginning rotation of the texture, in radians. Eg. setting start to PI will cause the animation to begin with the texture rotated 90 degrees from its default orientation.
• length specifies the total amount the texture should rotate, in radians. Eg. setting length to TWO_PI will animate a full, 360-degree rotation. Setting length to less than TWO_PI will cause the texture to rotate the amount specified, then jump back to it's beginning rotation.

• without the SMOOTH flag, rate specifies the animation speed in frames per second. There seems to be no way to control the number of frames in a non-SMOOTH ROTATE animation, and appears to be fixed at six frames.
• with the SMOOTH flag, rate specifies the animation speed in radians per second.

SCALE Animation Mode

• start specifies the number of repeats-per-face of the texture at the beginning of the animation.
• length specifies the total increase in repeats-per-face of the texture over the course of the animation.

• rate specifies the animation speed in integer scale changes per second; this does not work well for non-integer values of start and length, unless the SMOOTH flag is also being used.

• This mode seems to treat start and length as integers, not floats, dropping all decimals.
• Setting start to a negative value will apply the absolute value of start as the beginning repeats-per-face, but will decrease the repeats-per-face by length-1 over the course of the animation, instead of increasing it (ie. zoom in).
• Setting length to a negative value ignores the negative sign; it's an absolute value.
• Another way to state this is that starting_repeats_per_face = llAbs( start ), and the end_repeats_per_face = llAbs( start + llAbs( length ) ), or llAbs( start + llAbs( length ) -1 ) for negative values of start.
• Setting rate to a negative value is exactly equivalent to using a positive value and the REVERSE flag.

SMOOTH Animation Mode

llSetTextureAnim(ANIM_ON | PING_PONG | SMOOTH | LOOP, ALL_SIDES, 8, 1, 0, 7, 2);

default {
    state_entry() {
        llSetTextureAnim(ANIM_ON | SMOOTH | LOOP, ALL_SIDES, 1, 1, 0.0, 0.0, 0.5);
    }
}