Biased vs. Unbiased, Reyes, da kuma GPU-hanzarta
Idan ka yi amfani da duk lokacin da kake duban abubuwa daban-daban na kasuwa a kasuwa, ko kuma karanta game da maƙasudin sasantawa, to akwai yiwuwar ka samo kalmomi kamar ƙyama da rashin yarda, GPU-hanzari, Reyes, da Monte-Carlo.
Rahotanni na gaba na tsarawa na gaba sun haifar da adadi mai yawa, amma wasu lokuta yana da wuyar fadawa bambanci tsakanin shagon kasuwanci da kuma siffar gaskiya-da-allah.
Bari mu dubi wasu kalmomi don ku iya kusanci abubuwa daga hangen nesa mai haske:
Mene Ne Bambanci tsakanin Rawanci da Bada Shawara?
Tattaunawa game da abin da ke tattare da fassarar ba tare da bambancewa ba tare da ma'ana ba zai iya samun fasaha ba da sauri. Muna so mu guje wa wannan, don haka zan yi ƙoƙarin kiyaye shi a asali.
- Ba da son kai ba - Masu ba da labari ba kamar Maxwell, Indigo, da Luxrender suna da yawa ana kiran su kamar yadda suke "samar da kayan jiki". Kodayake "cikakkiyar jiki" wani abu ne na mummuna (babu wani abu a cikin CG wanda yake da cikakkiyar jiki), lokaci yana nufin ya nuna cewa fassarar ba tare da bambance-bane yana ƙididdige hanyar hasken kamar yadda ya yiwu a lissafi ba a cikin layi na halin yanzu-gen sa algorithms .
A wasu kalmomi, babu kuskuren tsarin ko "bias" da aka gabatar. Duk wani bambancin zai bayyana a matsayin kararraki, amma ya ba da lokaci mai yawa wanda zai iya yin amfani da shi a cikin hanyar lissafi "daidai". - Biased - Masu ba da izini ba, a gefe guda, tabbatar da wasu ƙuri'a don amfani da inganci. Maimakon yin watsi da har sai an sami sakamako mai kyau, masu ba da ra'ayi mai ban sha'awa za su gabatar da nuna bambanci, kuma suyi amfani da ma'ana ko ƙuntatawa don rage sa lokaci. Masu fassarar da ba su da ma'ana ba na iya zama mafi kyau-tunaninsu fiye da takwarorinsu marar bambanci, kuma a hannun dama, wani zane-zane mai ban sha'awa zai iya haifar da kyakkyawar sakamako mai mahimmancin lokaci CPU.
Saboda haka, kyakkyawan zaɓin ya kasance tsakanin injiniya mai ban sha'awa, wanda ke buƙatar karin lokaci CPU amma mitar zane-zane-zane don yin aiki, ko kuma abin da ba'a so ba wanda ya ba dan wasan ya zama mafi iko amma yana buƙatar lokaci mai yawa don zuba jari.
Kodayake akwai komai ga tsarin mulki, masu ba da ra'ayoyi ba tare da bambancewa ba suna aiki da kyau don hotuna, musamman ma a cikin ɗakunan gine-gine, amma duk da haka a cikin motsi, fina-finai, da raye-raye suna nuna yadda za a iya yin amfani da kayan aiki mai mahimmanci.
Ta yaya GPU Faɗakarwa Factor a?
Ƙararrayar GPU shine sabon cigaba a cikin fasahar samarwa. Ma'aikatan wasanni sun dogara ne akan fasahar GPU na shekaru da shekaru, duk da haka, kawai kwanan nan ne kawai an bincika GPU haɗin kai don amfani a aikace-aikacen da ba a ba da gaskiya ba inda CPU ya kasance sarki.
Duk da haka, tare da karuwar nauyin NVIDIA na CUDA, ya zama mai yiwuwa a yi amfani da GPU tare da CPU a cikin ayyuka masu ba da kyauta, don samar da sababbin aikace-aikacen aikace-aikace.
GPU-accledrated renderers iya zama ban sha'awa, kamar Indigo ko Octane, ko kuma son kai kamar Redshift.
A ina ne Renderman (Reyes) Fitar da Hoton?
A wasu matakai, Renderman ya tsaya daban daga tattaunawar yanzu. Yana da gine-ginen gine-gine mai ban sha'awa dangane da Reyes algorithm, ya ci gaba fiye da shekaru 20 da suka gabata a Pixar Animation Studios.
Renderman yana da zurfin aiki a masana'antar kamfanonin kwamfuta, kuma duk da ci gaba da gasar daga Arnold Angid, yana iya kasancewa daya daga cikin mahimman hanyoyin da za a iya kawowa a karshen shekaru masu zuwa da kuma abubuwan da za a samu a cikin shekaru masu zuwa.
Don haka idan Renderman ya kasance sananne, me yasa (banda kwakwalwa a wurare kamar CGTalk), baku ji game da shi sau da yawa?
Domin ba a tsara shi kawai don mai amfani na ƙarshe ba. Dubi cikin layi na CG na yau da kullum kuma za ku ga dubban hotuna daga rayuka masu ban sha'awa irin su Vray da Rayuwa Rayuwa, ko kuma abubuwan ban sha'awa kamar Maxwell da Indigo, amma yana da wuya a zo a kan wani abu da aka gina a Renderman.
Gaskiya ne kawai ya zo ne da gaskiyar cewa Renderman (kamar Arnold) bai taba nufin amfani dasu ba. Duk da yake Vray ko Maxwell za su iya amfani dasu sosai ta hanyar wani zane mai zaman kanta, yana daukan ƙungiya don amfani da Renderman yadda aka nufa shi. An tsara Renderman don samar da man fetur mai yawa, kuma wannan shine wurin da ya bunƙasa.
Mene Ne Ma'anar Ma'anar Mai Amfani?
Da farko, yana nufin akwai wasu zaɓuɓɓuka fiye da kowane lokaci. Ba haka ba tun lokacin da suka wuce, fassarar wani abu ne na sihiri a cikin duniyar CG, kuma kawai mafi yawan masu fasaha na fasaha sun riƙe makullin. A cikin shekaru goma da suka gabata, filin wasa ya sami babban abu da kuma hoto-hakikanin abin da ya faru ya zama cikakke ta hanyar wanda ya dace (a cikin hoto har yanzu, akalla).
Dubi jerin jerin kwanan nan da aka wallafa don samar da injiniyoyi don jin dadi nawa da sababbin sababbin hanyoyin. Tsara fasaha ta tashi daga cikin akwati, kuma sababbin hanyoyin kamar Octane ko Redshift sun bambanta da tsohuwar matsayi kamar Renderman cewa kusan ba ma mahimmanci don gwada su ba.