Case Study- Scanning of Metallic Carved Horse

i have a metallic horse with fine carving details... To test and improve my laser scanning setup i put this horse into practice: Following were the goals of this case study:
1- To determine How minute details i can get on such shiny metallic objects
2- To adjust parameters Hardware as well as software to achieve my goal
3- To do a Planeless scan and merge

A Fine powder spray was done on the Horse to make it dull but in such a way that the details can be viewed with the webcam... My Laser is mounted on 1:256 Gear box that is driven with stepper motor... I am using DIY SLA7062M based stepper driver that can run the stepper motor in 1/2, 1/4, 1/8 and 1/16 micro-steps ... To get the fine details at 800 x 600 camera resolution and 150mm calibration scale using green line laser i changed the microstep mode from 1/2 step to 1/16 steps.. Now I have resolution of (200 x 16x 256 =819200 pulses per one complete rotation i.e.0.000439 degrees/step ). This resolution is fine enough to get the Horse details from 3meters distance from the Webcam...However i have kept the horse about 300mm far  from the Camera ...Following are 4 multiple scans of the horse:

The results I found were satisfactory as the Webcam Logetech9000 has the limit... To get more fine details I have to do:
1- To get expensive CCD Monochrome camera
2- To get fine green line laser that should be focusable

The thinner the line the more details we can get.