Script to render molecuels in PYMOL

render_movie.pml

# Envoke by
# > pymol -c render_movie.pml <trajectoryfile.xyz>
# > convert -delay 20 -loop 0 mov*.png <outputfile.gif>

# load opt.xyz
show sticks, all
bg_color white
color grey05, elem c
preset.ball_and_stick(selection='all', mode=1)
set ray_trace_mode, 4
viewport 1024, 768

set ray_trace_gain, 0.1;
set ray_shadow_decay_factor, 0.1;
set ray_shadow_decay_range, 2;

set antialias, 2;
set reflect,0.5;

set light_count,10;
set spec_count,1;
set shininess, 100;
set specular, 1;
set direct,0;
set reflect,1.5;
set ray_op

set ray_trace_frames=1
set cache_frames=0
mclear
mpng mov