Gathered all the data I had of M42 in RGB and hit it with PixInsight.
The data was about fifty frames each of RGB with four minutes exposure.
Large image here 24MB
http://d1355990.i49.quadrahosting.co..._07/M42_PI.jpg
I processed to show the dim stuff including the noise.
Here is a version showing more detail in the bright bits 20 MB
http://d1355990.i49.quadrahosting.co...7/M42_PI_2.jpg
Bert