Filters break multisamples

General Discussion
23

I tried a FXAA filter (from here: [filters and multisamples)). To me it doesn’t look as good, but I could say more surely if I could use CommonFilters (cartoon inking) and a custom filter (FXAA) at the same time.
I don’t know how:

# common, cartoon inking
filters = CommonFilters(base.win, base.cam)
filters.setCartoonInk()

# custom, FXAA
filter_man = FilterManager(base.win, base.cam)
my_map = Texture()
final_quad = filter_man.renderSceneInto(colortex = my_map)
final_quad.setShader(loader.loadShader("fxaa.cg"))
final_quad.setShaderInput("color", my_map)
final_quad.setShaderInput("active", 1)
  File "C:\Users\DK\Desktop\dev\src\test.py", line 12, in <module>
    filter_man = FilterManager(base.win, base.cam)
  File "C:\Panda3D-1.8.0\direct\filter\FilterManager.py", line 57, in __init__
    self.notify.error('Could not find appropriate DisplayRegion to filter')
  File "C:\Panda3D-1.8.0\direct\directnotify\Notifier.py", line 132, in error
    raise exception(errorString)
StandardError: Could not find appropriate DisplayRegion to filter

Also, FXAA seems to be considered an advanced shader effect by Panda, which might not work for some users.

Another thing I noticed today: why does ShaderGenerator affect the cartoon ink filter so much?