Title: I really need help with eliminating noise Post by: graysonsoldahl on July 17, 2014, 09:59:42 AM Hi! I was hoping for my first post to be an image, but I need help getting there.
I'm having the hardest time getting my image to be clean. I've read the tutorials I could find and watched some videos, but I still can't eliminate the noise. I really like this fractal and want it to be my first mandelbulb 3d portfolio piece, which means I want to render it at 15000 x 9000. I haven't bothered since I can't even get rid of the noise at 600 x 360! I'm currently trying DE 1, RM 0.02, SL 0.01, SC 16, SN 8, normals on de is not checked, and first step random is. I'm really not sure what to do. Title: Re: I really need help with eliminating noise Post by: taurus on July 17, 2014, 11:09:26 AM Best, you post the params. You know how to do?
Title: Re: I really need help with eliminating noise Post by: graysonsoldahl on July 17, 2014, 11:21:04 AM Mandelbulb3Dv18{
g....UZ....O/...w....2U...EE.hQx2nsxzuHxaEjW.JzjVWh1U2CxFynd1f89FYAZzOVcxnGYORzj ................................s32lczY0n/2........Y./..................y.2...wD ...Uz6.....3.....M.2/.....UGU...J0....E4.....ggT5GNJxViD/.........Uy/dkpXm1.BnAH z.U0LD8D12../..........wz.................................U0.....y1...sD...../.. .zX0LD0Dg5fAIP8TcvXRZZBdbBFTyKiPvkdvw5cjDGFBm3Br4u1fbTDTJUVsyUZ6V.Pjz/iDeRFpzKxx PtHlkI6dI/6syS06tOMPM6iDU.....on3.............sD.6....sD..G..................... .............oAnAt1...sD....zw1.........................................G....k1. .....Ksulz1.....63kz.wzzz1ER.Q6.6/...M2....9....m....I2....F....6/...Y21....SF52 ...U.q19QyjS35zzjcVVzHrdS16.o6nzpvjq............6...........uN6sL6pxz0.7NwDsOWD. .oRaqWXXzz1.0PJWp1Puz............ElFz5ou70..HsF6LWuyzu/0/XcEjV.E.........../22Yy a1AO..U4mM1.B6tD.8m9wH4wGy9.1lxD7zpxzK./rkzS6qD..Y0QlhliUy18H6ogiRFcz0kNKpAXXPzj /EU0.wzzz1...................................MfqF1.qib9ve4Ge7PB.EI3QBf7Gqpsm.2F5 jNW3ZFLOM1EEWsZ7GtbTaB9.yE/IH.bTU08c..2E./2ly/8cU0.E./2EMw5cU08../2E.lqTU08c..2E ./2kz/8cU0.E./2E...cU08czz/cU08cyz1cU08cxz3cU08c................................ E....6E.F2E.....2....A....EEh3aSdtqNU6oPs/EN..........................k/9....... ...................1./........xDaNaNaNaNaz1..................................... ................................................................................ .....................2.....3....6....2IPVdLOiR46HJbQa/.......................... .Q..4MU/.6..1AU..............UzD........Uz1........wz........E/E........I.2..... ...3./..................kz1..................................................... ................................} {Titel: maybe23} like that? Title: Re: I really need help with eliminating noise Post by: taurus on July 17, 2014, 09:27:39 PM I assume, the main problem in this parameter isn't noise - I don't see noise at all - it is aliasing ( the stairieness within the "side-pillows" and elsewhere). Noise means some grainieness. The aliasing seems to be a property of the used formula combination. You can reduce this by antialiasing a downscaled bigger render. The max useful ratio here is 1:3. I attached a parameter with increased raystep and stepwith values, that should do and a 1:3 scaling for a destination res of 960 x 576. Hope that helps.
Code: Mandelbulb3Dv18{Title: Re: I really need help with eliminating noise Post by: graysonsoldahl on July 17, 2014, 11:11:07 PM Thanks it does help me understand what's going on.
Unfortunately it still doesn't look clean but if that's just the way the formula is there's nothing I can do about it. Title: Re: I really need help with eliminating noise Post by: JohnVV on July 20, 2014, 04:08:51 AM There is always " post processing " i like to use G'Mic for that it used to be called "GREYCstoration" it uses a heat flow PDE to process the image http://gmic.sourceforge.net/ the shell terminal version handles 32bit floating point images or any of these data formats { bool | uchar | char | ushort | short | uint | int | ulong | long | float | double } it is part of CImg.h http://cimg.sourceforge.net/ |