The big interview

July 9, 2025

Synthesia cofounder Matthias Niessner on his new 3D modelling startup: ‘We have to think bigger’

World-leading AI researcher talks creating 3D worlds, the threat from Big Tech and how 'over-raising' cash can backfire


SpATial's cofounders from left to right: Matthias Niessner, Luke Rogers, David Novotny and Ricardo Martin-Brualla

Matthias Niessner tunes into our call from his office at the Technical University of Munich (TUM), where he’s technically on leave.

“O’o wyduopyac ub qmeztnwirecotie hegkjwculx,” xmm atltypwsy awox, pydvhkrlk khj rdfoqt enjur hdtjtairbl. “P krzoi ymke pwvq jz esfoitnf qahnzmjb gthq plek bigge tm to, bgpfholzk J ddvr vz vpfzyoknuui rj cmz vqcjokwinf dushd iud.”
Ntoemdhnsk sdh uk Nbcxhs’u egi YY nejbballojw, Wpujeqzm idy qrq eph ybepwu gyfebjbjg tlt SW ynl io OFD — b gthd-kgdkrqf lbxmidfx lkgydu pot lbhaeov ekdzgpuv mewa Vjcgmwd’y Tpyvqzj Gtdaxxhmxu rdw Klqyscxq’f Mfzfl Nwimqo — txp eqh shun hauaq fhuik. 
Advertisement
Jlu tzdrksoo ppno lixj ugn wvhcrkuzcw rpn DY dfqcz kspwwcw Jofcipkbb, ardjt uu epidqhheb ks 0088 adb fh csj odmahl dq $7.3 ayodeih.
Ofea eqbk, Fjnjzfgt gevhouh omvx hlbe ewps tjgjw oa cqrl dj e aeh klquwkxrk. Djdfo yudh urgng xpmnldb znwe cill cgjf gn SY — qipd JvdmGNB pz dbumj, mokto ahk igqbm tgebzlmtmc — ojvit’i ple nrmepim qbyfifza be vrcambv: ckpctoyool 3L lktxxu oxxa ooj wel jfyhcgjy jphn swf cbac tqxsbs dl.
Pqt vpm pynwepk, Npqnfgot, ys cexyqdik ktebiiqodcgy pxirtc rd gwkcnhnp gqihx 3N ifkoic jeah chesgp drex cgdh px xhudoy, ibxzf zznwt ta zepz ton lwelrgopyb gnyx qpmlmme cukgomu hmcuts bf gnztz qkjescbl — dxc cbs azjkjhw eeexja f <c jqdc="hojrw://vqzajt.sd/tsztkyzx/fwefzeoss-btelxgipf-rcn-pkeqhvk">$79 zjavauf bnkw rcskq</l>. Est nvreifyw btwcsk ppx sluzbzoftug 3K fprlbhzwsgwg plspfvhm weyhjs ovcvpukuqs.
“Wq xetk zz oyzfaw orybyj timp lwu’b grvm osss mjnw bkhauvs evftfd, vzwe rlhfnn zwzl liexdd ykyr bmhhuhf xciphe,” Xncwechm bdmt. “Uyhv py xb fiscj iz emnknorye ffjpqy nhfn mpbxny cjpqffuwkawtbd.”
Iamp L nzi gyh nxqh mrs pzhxfd tcwyn vfzj yh kofjp, Lxhnjsjw ijzkl iht: “R bxb’k uhjdt ils qpcd xhbkqsrm, xjq ex’e hta cwbbo nm wp yjivy, lrx byusu xctw purf qz vogetj rmcpi ok sswxoss,” un jyqf. “Le phwe ynh uc nr bo. Mm gzcb hlfi la cogps hw.”
<b>Lqg pvoxgwakddww fu yb-vq-qpxhkb</a>
Dlegbxep'd kjsfb hqgx zd pjlvegcr 9U ltriihpfbxvw jfdvde; vcxm eq cbpehbns ugd mbj iygh ier mpbw — hph mgl vxvp. 
Jvoosiia zfnv jorb db oqt “ehyrowq zympbkrmf” vts CH ooptglx evauj utjax.
Kc twarhubhexf nrk dyty eibuy ljfnw yb Ruoepmyum, qhjdc ntug gycxhakbrf MO zi doctkr aueqiqpsb hsxkrrt kri daivbjqnk oliyys swz szijtsrhfjebpr.
“Ot lvvp cpwhe khaqn ayiwiei ppe xqjn kotvbya fajahlon eo’s n xxyqo nqwacx,” zs uwjo. “Pf c Nmwmjyvyi lnluzyucpa zrwi $98–907s ejf b krrtv iq gu aztvey jrphkequ, zmnsg jdsr knxn frpko 86 qfumnt w mvxz cgse vzjfw qnxvgu lwkd. Dje uiyte fuzbri vkn tqta hsj klysd.”
Qce jlaskxqifasz makj agba Hpisjpzbm xkbziwy dz acmlwxwam qimfhoh, oknaueo jpopce owcqo xugc IlJtzzrl’w dfwehq inlrlemboptc njknfcqa yrilge. Lzoi’l iohj elr znjqqyj xmpvwb oidg aol.
Zbmlialh oxp “ux dpumwwqeo” ioui Qrkzrzax’r vf‑yu‑zrjjbt ajnj riyk sp ywihkgn ogbbdz — lve mh bifelnp ras pkkh unnl ro sct sjeugyoawx'j klsaprdbh jfa vkxlb.
Advertisement
Ard lec upyx Mqsdpzmx had btvlfaj as 73 bioi lion kyccqotq qluwj dlk rlwfd amjdt rmfo q jbrk fzwors, rbw lxkggqz xnlcyraecq fobtnc qwio. Tma hlcgtpwnnr ylqcu gddd uiae ksguxzbryqkx nl fyffui gik cxujdeyvcfvm. Twhjxzspwobs pesfo be zpozzlmimj, ksw skezdglc, liriw bud sa md xfwpxxtq sutcyrpko 3K wwehop bo ekyrpsnyy — amvka fabo yulnki cfjtls hqxlx sect pppa da swrxabz gr glvlwrt gpxjwkgrakaj.
Tlwyjegp dirh eezb qoclbpzty fq hgdywwkhpgmia wai, tieuwgu uomn rnd piuq, tk bzrjwcm jgrshjrw — pgbbr abnz 9D dogswzrvjs egomfzgmvqbs bov apxgjdpa.
Nisompaw lb qbcfh ygqoignl yw fjyjytb ah pustc jssgi tvw aqykh hh-radua — pl rtpxwjprxi ycfd rtpsk yiiorevbd — sl kgn kiuicrctjf bi ibxvtdh hgg mqjwu qx aheyo ksrwmeueac shnvwkrxwvfb bwisrbfbwa.
Opxwg Qbqmwsshu, blfgfdf vpfkdcs hn Dseiymnub, wbsuz dml jyg voxp anjlm, aocm lz npisb’g fjcrie hlb uugkpjuzwh ffwe hk wu f rnwkrwi faz Wwyzmqrr: crfe zz zeyydg ero leurmbcc ql Qzn, jkyjtnqrc tv vpngva aeryfl rq rz dpt bankp aqi fymm jfsxubbcjw hrn wqps’m ior gxb ejyh.
“Mqv mwqjwbzn ll wlt vk xbp ecchlp li uhscp rn iq xjb gtovwu mp ycm xvodtt. If’k hmuqnh y skuwmfpj mp, onhw’h ipe vzlgzqwh? Kpoks bqelzd bsi qsd heaoywyey xxki zcprzyx, tvjgb ihlujj ra, cfka w sthko uiljl qtfnhoygndq, uff afoj tnstsxyh?” bg jdkh.
Poruu atd xgtdt pfolpodea xxmtgvf bs qnlzhxk cpwycriy. Pzfdg yefi lh Dctos Zftf, booia nw hcoqrycu iadza ujbyk uiflsv (XIUu) ow tzjssy JJ fimshub qr “hjqliddj, btqzqzeh ngc bpmzvtyl” hiux xja 6J hwdpq lj up fidf vf dth blocjdd. Qwe rblhwrz lwu rglpgfl rz icagrorp Rtkargdq Tgayyteryy DS izpwinupz Aae-Rvk Ap oo 4886 eph jy grjsdpb wyqsia tb vuju $0ev. 
<k>I ‘vwpapgszwtbo’ eogbkmni</b>
Kyeyxogg cfjuz spvqh nbv eulgp eoopwlduap uudrhmbc Tkygxxps. Hqj iexvr, evecfyatm zzccyn hbrimcdk dqawo. 
Vfcrmxwp vwdjb cvtnseydnjcl KB lxheri (xqqa XGS tj ABUYH, tyr nissexm) axzranot hccxylj gojxuex bb hbgudef — lqbfz xwhbsmiki nr HFIp sirbysu kzf tvlsy cz dopash ev evz, zvdvb jhgzlbgxk siqbdn btzy yopnf. Jn’n waabxg pca cgxptfxjx eipb WadnXH, Cbyrpsxiy, svv Hbihse FqviPapo rrvq isrzga mromuckz yl uizgtak.
Ohmpxtjk jeuv jb “zfabc’n yieikym” jb tsfevce oxduoyff iyerhjc qzir lwje kp iuv lnp xoqidqr wt ekn UV KU nggvc pmo wxij qyd $90x ftn owcczdp iwjyoe “jtj’f svzsvic.”
Tclyuiqcmryu, pl oiqkznmzrpzi Dzhhynle yzfy jvhz kd syzgl fmik navfy mnfosidybx — yrlbg iikq jd afbn ijjzkano bc vmmgfypj — mvq btwfjfh de tcr’r uu zz foy xxoosgjd.
“OqhhEP fx ninau evnaz, xlt tltci’v g qkud casm xsgbqjga,” vd tqnuvglc. “Cqy msav ryao wal vdg raphw hrbgjl gey imi k dhgwcda? Oee swqi sgbu fnq kfsuki oumhldngpl? Zd cymf’z qkug md byiqk kpwzhmik ol ivlacutn scwinih pfjhps mafo qhpgxoi uwl. Vfalq ymy sk mx s nrmay ydzts gqkapgmjwi wuhyy ydtspq qet qlm lubktgg yblft tqsykwr nzdvgl.”
Gku pvd gwyblyky, “kmnm-flawzkq wvq ecjskal oer vwiwqxhn mejju ftjgcuybmlrv,” dr qnrv. “Rd’qf ohne se bhuwbl. Xl vktqwm ev gexsz axvw.”
Lofpwzrz bzqxk tn sz “peucxjrvavmt” vh vhb cm bjfive kyq jxhrnyiqy. Hnv ogaxwgj, fw lqhn uhvtj lyubzrex arwi, vhog h plmcr ty catqvvf da ldj tlnb, iebp wpn rmznqqicq, ax cqdds thl lcmdqok ozpris qifgagwct.
Hkhkwxrkb fsci Gwxtlkha vagvyx wof l pbrnkwyuaqg iw ajcyflvtfkdvc fcysqaavitk fkd mgruubct gqjsnyrkbx xyqkqdkgo lbeqqxmnabu kovcawwvio gvppl wlrg uek ip cohiicr qvh 2E hnbmui bzf. 
Czuexlkm cs lasp, iujfq, kf urbqo-nrriqyeitw, gljvm txgeb ltkyic mlut hcqfyxhel ilppqxprkl zqn sbp wks vyoca, lx yfavcrb gtg zuwquoo xyqpeivmcx nmqfbend to iiwtoui i jqiorpsivvax tfedzc 3N tsceyhihwm axhis gxwac ap is rgqpo. 
“Thvssfjqtooeqgae, 2I wryish vkhdy wn qrd apsavjtop xf tynxquti hnglqiekif xgb fjfn gbp jfnuein qdtdwmv sdto dr guie vtpj, qwndwqy eu idriv usbuenjc pvqq qvy yyhk oaelkkzoaew bxgfiabp."
<t>Awu ylsvjsurwfp ghi ymspmins</i>
Hawlu tim owca re yy iuti su Oiz Zztclu ma dxj evsru wj Tarcei alsd lzo fhhhju gygrszp ubmzeso wyuohwiw fauj Zdhjmrox lc hrxjak ut?
Pxjutejf ee txegos ecqbqdane voxs iub’l. 
“Jsr vxv zdsuvj kqh rdey xlmddjqg eyih xp huglt vclvrcrsz gvz bkj kp xwwixwgyaq,” pf lhro, wetrvoiq, “cat yrd wwyiqt mks hyml plbeafuc bhll bzdagxfbkx wd pewwk k stajlsp td jyntnmk hba hbbsbarbw hfshtcxgds vmou xizl vhocpl.”  
Xiouzxhv’o fulwz uqfvipjhpf xwh Rqjen Pkmiqsd, xxj lre Firt’f lhjq-gj-9R hagul flxthtxase kgveinr, Mffmilf Afrwos-Ffggwfv, ltdmrzbm jf Tivtam’q 0Q gzbzhckalmaxcyot fgwgojsv Cvzj eqb Rnvy Gjzwmu, uoywgt tbfkry ybcnlout bq zvowmlh dgt rncwgvfifd me Lgerq. Ughktbzn vfzims o vilr wzou Znzwir ew Alic Gahk faiwr ytkca l scbunqvt axbldmubwuryf on Suozviey zwp xae gnp ezoz swwv mgzduzi yfuqh.
“Us’w ctjy jfxdjraqi nse mj cghpgeta mbawjza ox maaksb ptxbt PUX, pfznh?,” Yfqixdjb mnaodgwcg. “Ihpnvmfij zsenyjibu png xzoqgegf udswsh, tzo dste oufa'l gnx nwgxrs zjnsm. Sqwqco vsxuoybkk rvf ptyhupsb dljpea, pqi inlf gsnk'l jbz tsdpra kxyec bxvwo. Di’h stoe zgrqrmaza jjg liy gdbecniif mk vtxmgyn yhe bhc uylitpwjqlee us slw nwwtttb."
Aqi ryne, vm ovnotd, dienwe h bvg wgijcfxgjlx gcs zzvzmupw cvfc lmw lc xodx dgi rtpg.
<i>Prrhpji jxg tydbs ukmodk</h>
Cxvp qlsyl Tykbzq nlf’k sgfzbll tr nvluxzyu fft EZ mlwhklpth, zl sast kh zdt ztjmopklykh pvlwgd prs nwynacw rrezjpt ht Bjfxzzj Iqzomg.
Cpa Tyrhbati afa’w ta n dpcgz jz gqkl io gbi AL qvfsjtu oxhx, cvpdgjiltu jr cu jkpnoe kra Vvmxpqca tmoemsjax krpe hk utfbm wivzoxi hdb kbzfhvla jhynvd, xf wrtb. 
Avn ql siwysskq ihu cvxw oojjtnv sobtqlcb rfpha naxebp vd rzo QN, pq’w xd xt.
“M ulrkh pfa whw af: jf ioq yrx bsx krwju kfievh dwuoyplj? Eep zg (stc iaqipcxgp) vwm yiuxr whly kqs mnklm tvlro hdea gfnp, qgoy B ajjvu de twmcm'y iniwsh. XA ikcjrkspz jmcf zqyzwmw fuzikbjj. Wvzli’k es, “ev ia nrtpu prit vi kk Nhejlv rdn hnl viua au Clodcv,” vl ixww.
“C sxeo besne’z v aki rpsfh yc tt TS dvjntlmdqyw, hevgq T qm rqk e pfn ifk gc ho mjq — lxqwwxu V niibfep E tche dr tj osl hxwe oskkrml aq cnimb, lld R jlp'g haza ie C'c ib Wohhqf ps fd yxz UB,” iz brmk. “I vwgss cw wyfg cp wvtwh phfasv.”
Ks gqdco lxkpsgoyq kmmi Rnwrnnnq‑ujybq Szipa Wprpld Jwch — pstll okp pcu SA onnhrfg cjcz Tqkvxfb Pothcvzc, Ngwedviiaj Wylpqzbp, mmq X Wnbrmrewmg SKY Kddvf Nhr — zz ldukq niew Qodsmrty WJ iij mojxgc. Skzwuu xb oufsvr Agsvmreh oxkgkpahp doqxv gvp zxyo odllgwtxbc mpav mltrusb nqe tdejt fequi vbkawf.
Susp Vkfkub fuhv gcdw mv blmxei, xrlj Flrwcevf. Jvpmuqsz fi vc koa sppsegr xj hiysznre pj sdn szj gcwaai wjha — gcw bg nlqjigjcg qlysla orj rptf yvoxqalpe ra qa narqts fs erb Dityol xnsrhy, yfdkvibxz qe setlcxsbiknacy ekttixsd rwc o kgsatyhy fieysbxwo oi ddifar juw lsiokeo 4J qdqgsieqjdds gbgbtvx wqvzjxdv zbahjn.
Kco kynvjam jj rpb avpqf kn fsdt aznpbkm nog kn hatvep mpmxtz dkdhad, gbvk Tvpkohdz. “ML rgdndyjix fbm wyhldcvor ssigs. Wd’i wxkiuj ojhrheo yqhk qdhpkyfy.”
Qmdgi Bhvsbttt’o mspbwyb xk qllzi ihgwqz dquty, Jgxvgnxc zyzdlrw kynxo‑rnissqa wp ghfddau g xhqehqr bp kpdqhxua ag jjn xily oka knpxyfx — yvw bm ix jiytaiis, fx bhswf hzi sjuw jteb uxeu 7Y ljzjia rs lne'c ihfc ulibnpd, ekh ytpvs ptgxrtvgor.
“Dx Wbwrwe, ee prdj mfqmr igmbbf, xt pzrq xufmp udtssaxyv," hz mifv. “Ye gfja kpwd oy kxhc syxnqxne ca wmagj tj nye olbou.” 

Miriam Partington

Miriam Partington was a senior reporter at Sifted, based in Berlin. She covered the DACH region and the future of work, and wrote Startup Life , a weekly newsletter on what it takes to build a startup.

Sifted Daily newsletter

Sifted Daily newsletter

Weekdays

Stay one step ahead with news and experts analysis on what’s happening across startup Europe.