Tutorial - Coins on a banknote

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Mosaizer Pro Tutorial Coins on a banknote Here you learn how to create a 3D photorealistic effect of coins that seems to have been dropped on a banknote, in the shape of a dollar sign. We will show how to ‘drop’ coins on a canvas using a source‐ and an alpha mask, how to tune 3D effects and how to add the background picture to the result. Finally, we demonstrate how to combine libraries of pictures into one new library.How to drop coins on a banknote About dropping coins The picture we want to create is not real. Although is seems that coins have been dropped, we actually use several features of Mosaizer Pro to create this effect. There are three key features to use: masks (source and alpha), 3D effects (shadow) and the random placement of the ‘coins’. Requirements We use a special library of pictures: euro coins. Pictures of the euro coins can be found on the internet. Next, you need an alpha mask in the shape of a circle with a very sharp edge to cut the environment from the coins. You also need a source mask in the shape of a dollar sign. Finally you need a high resolution picture of a banknote as a background. Steps to drop the coins on the banknote Step 1: make a library of pictures from the euro‐coins We used the 1 and 2 euro coins only. In total 24 coins were used (from 12 countries that have euro coins). Make sure all the pictures are of square size and not too small. Our pictures ranged from 150 to 170px in size ...

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Publié par	Kinuc
Nombre de lectures	73
Langue	Español

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MosaizerProTutorialCoinsonabanknote

Hereyoulearnhowtocreatea3Dphotorealisticeffectofcoinsthatseemstohavebeendroppedonabanknote,intheshapeofadollarsign.Wewillshowhowto‘drop’coinsonacanvasusingasource‐andanalphamask,howtotune3Deffectsandhowtoaddthebackgroundpicturetotheresult.Finally,wedemonstratehowtocombinelibrariesofpicturesintoonenewlibrary.

HowtodropcoinsonabanknoteAboutdroppingcoinsThepicturewewanttocreateisnotreal.Althoughisseemsthatcoinshavebeendropped,weactuallyuseseveralfeaturesofMosaizerProtocreatethiseffect.Therearethreekeyfeaturestouse:masks(sourceandalpha),3Deffects(shadow)andtherandomplacementofthe‘coins’.RequirementsWeuseaspeciallibraryofpictures:eurocoins.Picturesoftheeurocoinscanbefoundontheinternet.Next,youneedanalphamaskintheshapeofacirclewithaverysharpedgetocuttheenvironmentfromthecoins.Youalsoneedasourcemaskintheshapeofadollarsign.Finallyyouneedahighresolutionpictureofabanknoteasabackground.StepstodropthecoinsonthebanknoteStep1:makealibraryofpicturesfromtheeuro‐coinsWeusedthe1and2eurocoinsonly.Intotal24coinswereused(from12countriesthathaveeurocoins).Makesureallthepicturesareofsquaresizeandnottoosmall.Ourpicturesrangedfrom150to170pxinsize.Inaseparatetutorialisexplainedhowtomakealibraryofpictures,andisnotrepeatedhere.

Figure:halfofthecoinlibrary:allthe1eurocoinsfrom12countries.Step2:LoadingthemasksandafirstresultTwomasksarerequired:asourcemask(thedollarpicture)andanalphamask(thecirclepicture).Loadthemasksintheprogram.Alsoloadthesourcepictureintheprogram.Fordemonstrationpurposeswefirstusethesourcemaskassourcepicture(laterwewillusetherealbanknotebackground).Thishasanimportantreason:whenasourcemaskisused,alwaysmakesurethatthesourcepicturehasthesamewidth/heightratiotoavoiddistortionofthesourcemaskwhentheresultisrendered.FinallypresstheCreatebuttonandstudythefirstresults.Information:thesourcepicturedeterminesthefinalsizeoftheresult.Incaseasourcemaskisused,themaskisstretchedtomatchwiththesourcepicture.Whenthewidth/heightratiodiffers,thesourcemaskwillbedeformed.

Figure:firstresultsshowverysmallcoinsinaregularpatternagainstthewrongbackgroundStep3:Increasethecoinsize,addaproperbackground,randomizecoinplacementandaddashadowtoeachcoinThecoin(cellsize)sizewaschangedfrom32x32pxto60x60px,andfromA3toA4paperformat.Theresultingpictureresultsizedroppedthereforefromfrom1440x2112pxto1020x1500px,andtheamountofcellsdroppedfrom45x66to17x25(HxV).UsethetabSizeandshape.Figure:increasingthecoinsizeThenwetickedthecheckboxColoredcanvasinthetabSpecial,Background.Keepthecanvaswhite.WealsochangedtherandomsettingsinthetabSpecial,RandomsettingsbytickingthecheckboxesofrandomBuildandrandomPattern.Figure:randomizecoinplacementanduseawhitebackground

Finally,weselectedthe3DeffectShadowinthetab3Deffectsandusedthedefaultvaluesof5pxsouthand5pxeastofeachcoin.Thesearetheresultsforeachintermediatestep.Figure:ashadowforeachcoinwasaddedStep4:RefinetheshadowFromadistancetheresultseemsfine,butcloserstudyofthepicturerevealsatoounrealisticshadow.Asifastronglampwasshiningoneachcoin.Wechangedtheshadowdepthfrom30%to20%,theshadowintensityfrom40%to20%,andtheshadowpositionto2pxsouthand2pxeast.The100%scalepictureshowstheimprovementoftheshadoweffect.

Figure:left=defaultshadowandright:softenedshadowandmorerealisticStep5:AddthebackgroundtothesceneThe‘background’pictureisapre‐processedsourcepictureofa20eurobanknote(weusedPhotoshoptocreatethissourcefile).Asmentionedinstep2itisimportanttohavethesamesizeratioofsourcemaskandsourcepicture.Sowepreparedapictureofexactthesamewidth/heightratioofthesourcemask(leadinginsizethiscase)ofahighresolutionpictureofa20eurobanknote.WeloadedthispictureintheprogramviaFile|NewsourcepictureandpressedtheCreatebuttononcemore.Figure:detailofthecoins,droppedonthesourcepicture.Theinsetisthefullpicture.

Optionalstep6:VarythecoinsSofarwehaveusedthe1and2eurocoinsonly.Wefirstaddtwomorelibrariestotheprogram.Onecontainsallthe1,2and5centcoins(darkbrasscolored),theothercontainsallthe10,20and50centcoins(lightbrasscolored).Thenusedthesetwodifferentlibrariesandrendertheresultoncemoreforeachlibrary.Herearetheresults:

Figure:leftthelightbrasspicturelibrary,right:thedarkbrasspicturelibrary(36coinseach)Optionalstep7:Mixthe3coinlibraries(makeanewlibrary),andapplythenewlibraryWewillnowmixthethreedifferentlibrariesintoonenewlibrarywithall96coins.TocombinelibrariesstarttheTools|Settingsmanager|Combinelibrariesandonlycheckthelibrariesthatneedtobecombined.Weselectedonlythethreelibraries,gaveitanewname(‘Alleurocoins96’),andpressedthesavebutton.Thenewlibraryisaddedtothislistandisalsoimmediatelyavailable.SelectthenewlibraryviaLibrary/Readlibrary.ToincreasethesharpnessoftheA4orletterprintquality,firstchangethecellsizeto124,andtheresolutionto200dpi.Thegridsizeisnow19x28cells(or1577x2324px).Incaseyoudon’tgetthesesizes,increaseprdecreasetherandomamountagain.Information:thesizesthatareshownhereistheresultofseveralsettings.Whenyoucan’tfullyduplicatethese,it’sofnoimportancefortheresult.Justfollowtheeffectofthechangesandseeforyourselfifyouaresatisfiedwiththeresultsofyourownpicture.Toassurethatallcoinsareused(inrandomorder)don’tforgettoalsocheckUseeverypictureinthetabSpecial|Chaotics.Finally,presstheCreatebuttonforalasttimeandlookatabunch

ofeurocoinswhicharedroppedona20eurobanknote,intheshapeofadollarsign.Theresultisshownonthefirstpageofthistutorial.Optionalstep8:rotateeachofthecoinsWithversion7.0.33ofMosaizerProthecellscanberotatedwitharotatingmask.Todothis,simplytickthecheckboxesCellrotateandMaskrotateandchoosetheminimumandmaximumrotationangles.Information:theminimumrotationangleismeasuredanti‐clockwiseindegrees.Themaximumangleismeasuredclockwise.It’snousetogobeyond+/‐180degreestocreateafull360degreesrotation.WhenMaskrotationisusedwithCellrotation,theMaskresizedoesnotworkforthecells,butjustforthemask.Weselectedanglesbetween‐180and180degreestohaveafull360degreescellrotation.Theresultisshownbelow.Nowisseemsthatthecoinsarenotjust‘thrown’onabanknote,butinareallyrandomwayaswell.

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