This is a rarely imaged Ha region in Centaurus that I took during 2024 in Queenstown NZ in a not particularly good summer for astroimaging.  I was looking for interesting objects within a fairly limited balcony sky window and chose RCW78 after seeing an excellent wide field image by local astroimager  @Brian Boyle.  RCW78 more precisely seems to be the nebulosity at the centre right of the image and contains the Wolf-Rayet star WR55. 

The image consists of narrowband data acquired over 7 nights in February 2024 with a 80mm apochromatic refractor and a ZWO ASI1600MM-C camera at gain 139 cooled to -15C. Total integration time was 11 hours comprising:
Ha    16x720sec
OIII   17x720sec
SII     22x720sec

Image A was processed in Pixinsight with my now standard narrowband workflow.  After integration with WBPP, gradients -- not much with little local light pollution -- were removed from each master using the new Pixinsight GradientCorrection process. After combination into a SHO image, stars were colour calibrated with SpectroPhotometricColorCalibaration and the image was sharpened with BlurXTerminator  After removing stars, the starless image was processed with NoiseXTerminator, transformed non-linear with GeneralizedHyperbolicStretch.  While the stretched image had nice detail of the molecular cloud, I didn't like the colour as the strong Ha swamped the other channels.  I'm sure someone better at image processing than I am could have improved this, I decided to make another attempt using the Foraxx SHO palette.

The final image is the Foraxx result combined with the luminance channel from Image A and RGB stars extracted at the early stage of processing that image.  Using Foraxx requires a lot of work to stretch each channel non-linear and the result depends on how much each channel is stretched.  I used GHS to try and bring out the subtle detail but at risk from simply amplifying background noise.  Even after a couple of attempts with SII and OIII stretches the final image looked horribly saturated.  However, by adjusting the lightness and saturation transfer functions I was able to achieve  acceptable colour balance and detail.  Because the main image was drowning underneath a sea of stars, I reduced the colour calibrated  stars to about 70% within the Pixelmath expression that added them to the starless image.