GD111-3 Rendering Part 1-PPT

7/28/2019 GD111-3 Rendering Part 1-PPT

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Rendering Techniques in 3D AutoCAD,

Part 1

David CohnIndependent Consultant


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Pleaseremembertofillout

yourevaluation

form

Thisis

session GD111

3

Evaluation Forms

And, please silence your cell phone.


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David S. Cohn

Independent consultant

Contributing editor Desktop Engineeringcontributing editor

Former editor ofCADalyst, EngineeringAutomation Report and CADCAMNet

Frequent contributor to Computer GraphicsWorld, PC Magazine, and others

Registered architect25+ yearsexperience

AutoCAD experience20+ years

Author of numerous books & articles

President of Eclipse Software


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David Cohn is a Registered Provider with The American Institute

of Architects Continuing Education Systems. Credit earned on

completion of this program will be reported to CES Records forAIA members. Certificates of Completion for non-AIA members

are available on request.

This program is registered with the AIA/CES for continuingprofessional education. As such, it does not included content thatmay be deemed or construed to be an approval or endorsementby the AIA of any material of construction or any method ormanner of handling, using, distributing, or dealing in any materialor product. Questions related to specific materials, methods, and

services will be addressed at the conclusion of this presentation.


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Part1willcover: HowrenderinghaschangedfromearlierversionsofAutoCAD

Workingwithlights

Sun&SkyBackgroundsettings

WorkingwithMaterials(includingcreatingandmodifying

materials)

This is part 1 of a 2 part class


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Inpart2,wewillcover: TheRendercontrolpanel(incl.renderdestination,render

procedure,and

output

resolution)

Preparingyourmodel

Adjustingrenderingsettings

Placingcameras

and

creating

views

Savingrenderedimages

Creatingwalkthroughsandflythroughs

Part2willfollowthisclassfrom3:15 4:45pm(hereinthissameroomaftera30minutebreak)

This is part 1 of a 2 part class


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RenderingtoolshaveexistedinAutoCADformanyyears,but

remainedlargelyunchangedsinceAutoCADR12.

CompletelynewbeginninginAutoCAD2007

Basedon

mental

ray

renderingengine

(same

as

Autodesk

VIZand

3dsmax

Newcommandsmakerenderingeasier

Additionalnewcommandstowalkorflythroughmodels

RenderinginAutoCAD

Creatinga2Dimagebasedonyour3Dscene


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Can

display

models

with

realistic

materials,

lighting,

and

shadows Dependsonthecurrentactivevisualstyle

Visualstyle acollectionofsettingsthatcontrolthedisplayofedgesandshadingintheviewport

AutoCADcomeswithfivepredefinedvisualstyles 2Dwireframe

3D

wireframe 3Dhidden

Conceptual

Realistic

Youcancreateandsaveyourown

NewbeginninginAutoCAD2007


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Lightsandmaterialsfromolderversionsdontwork

3DCONVERSIONMODE

0=no automatic conversion

1=automatic conversion (default)2=prompt to convert

If set to 0:

CONVERTOLDLIGHTS converts older lights to new format

CONVERTOLDMATERIALS converts older materials to new format

NOTE:Proceduralmaterialsandmaterialmappingsettingsdonotmigrate.

Also: MaterialbyACInolongersupported

LandscapecommandsLSNEW,LSLIB,andLSEDIT nolongerincluded

RenderingcaveatsIfyouusedrenderingtoolsinearlierversionsofAutoCAD


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Timeconsuming:youcanspendalotoftimeadjustinglightingand

materials

Youmay

spend

more

time

creating

the

rendering

than

building

the

model

Multiplelightsourcesandshadowsrequirefastcomputers

Youcanspeedthingsbyfirstrenderingtestimagesonaportionofthe

model

CreatingRenderedImages


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Createthemodel

Placelights

Attachmaterials

to

objects

Rendertheimage

Fourconceptualstepsofrendering:


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TheRenderPanel


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Initially,

light

comes

from

two

distance

light

sources

that

follow

the

viewpointasyoumovearoundthemodel.

Allfacesareilluminated

Youcontrolbrightnessandcontrast,butdonotneedtoplacelights

Defaultlighting

must

be

turned

off

in

order

to

display

lighting

from

user

created

lightsorthesun

WorkingwithLights


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Controlled

using

the

Light

control

panel

WorkingwithLights(cont)


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After

placing

lights,

you

can Modifythemusinggrips

ControlthemusingthePropertiespalette

Spotlightsand

point

lights

are

representedbyglyphs.

Glyphappearancecanbe

controlledusingadialogbox

WorkingwithLights(cont)


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PhotometricLights

New

starting

in

AutoCAD

2008 Usephotometric(lightenergy)values

Moreaccuratelydefinelightsastheywouldbeintherealworld

LampintensityexpressedinCandela,Lumen,orLux

ControllingviaLIGHTINGUNITSsystemvariable

Value Description

0 Nolightingunitsused;standard(generic)lightingisenabled(systemusedinAutoCAD2007andearlier)

1 PhotometriclightingenabledusingInternationallightingunits

2PhotometriclightingenabledusingAmericanlightingunits


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PointLight (alightbulb)

Radiatesinalldirections

Intensitydiminishesoverdistance

InACAD2008/2009,canaddatargetpoint

TypesofLights


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Spotlight (aspotlight) Emitsadirectionalconeoflight

Intensitydiminishesoverdistance

Youcancontrolthehotspotandfalloff

InACAD2008/2009,canaddaFREESPOT(hasnotarget)

TypesofLights(cont)


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Web

light (a

3D

representation

of

light

intensity

distribution) AvailablewhenLIGHTINGUNITSsetto1or2 Representnonuniformlightdistributionderivedfromdata

providedbymanufacturers AddedusingWEBLIGHTorFREEWEBcommand Commonlyusedfordefiningphotometriclights,including

fluorescent,low

pressure

sodium,

incandescent,

and

high

intensitydischarge AvailableonLightingtoolpalette

TypesofLights(cont)


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DistanceLight

Travelsinparallelraysinonedirection

Intensitydoesntdiminishoverdistance

YouspecifyFROMandTOpoint

Noglyph

Notaccurate

when

LIGHTINGUNITS

=1or

2

TypesofLights(cont)


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Sunlight Simulates the sun (parallel rays with same intensity over any distance) Properties controlled using Sun panel on Visualize ribbon bar; angle of light

controlled using Time & Location panel Can choose method to locate the model

TypesofLights(cont)


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Sunlight Differentmethodstospecifylocation

ChangesettingsusingSunPropertiespalette

TypesofLights(cont)


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Availablewhen

using

photometric

lights

Controlskyproperties

Groundplane(horizon)

Haze

Scaleandappearance

ofasun

disk

Otherskyandbackground

settings

Sun&SkyBackground


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Embed

photometric

lights

in

blocks Createlightfixturethatmodelsbothphysicalandphotometricpropertiesofactual

lightingfixtures1. Model3Dlight

2. SelectphotometriclightfromPhotometricLighttoolpalette

3. Positionitwithinthemodelofthephysicallight

4. Createablock

containing

geometry

and

light

UsingLuminaireObjects


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Each

light

(except

sun

&

lights

in

blocks

and

xrefs)

appears

in

the

LightsinModelpaletteandcanbecontrolledintheProperties

palette

Type

Status Shadows

Intensity

Color

Other

settings attenuation

shape

ControllingLights


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400+

materials Needtoinstallmateriallibrary(during

installoruseAdd/Removeprograms)

Availableonpalettes

Materialsincurrentdrawingappearina

Materialswindow

WorkingWithMaterials


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Toanobject dragontoobjectoruseApplyMaterialtoObjectbutton

Toaface pressCtrlanddragontofaceofobject

Bylayer useAttachbyLayerbuttontodisplaydialogbox

ApplyingMaterials


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Realistic&RealisticMetal basedonphysicalproperties

Advanced&AdvancedMetal materialswithmoreoptions

YoucancreateormodifymaterialsineithertheMaterialtoolpaletteorthe

Materialswindow:

Changesmadeinthetoolpaletteaffectthematerialslibrary

Makeacopyfirstandthenmodifythecopy

ChangesmadeintheMaterialswindowaffectonlythedrawing

Youcanaddanynewmaterialstothetoolpalettesothattheywillbeavailableforuseinother

drawings

CreatingandModifyingMaterials


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Template specifiestypeofmaterial

Color colorof

material

ByObject materialcolorbasedoncolorofobjectattachedto

Diffuse maincolorofmaterial(Advanced&Advancedmetaltemplatesonly)

Ambient coloroffaceslitbyambientlightonly(Advanced&Advancedmetaltemplatesonly)

Specular colorofhighlightonshinymaterial(Advancedonly)

Shininess reflectivequalityofmaterial

Opacity how

much

light

passes

through

surface

(not

available

for

metals)

Reflection howreflective(Advanced&Advancedmetaltemplatesonly)

Refractionindex bendingoflightrays(1.0=nodistortion;1.5=significantdistortion(Notavailableformetaltemplates)

Translucency percentageoflighttransmittedthroughobject;0.0=nottranslucent,100.0=astranslucentaspossible(Notavailableformetaltemplates)

Selfillumination material

appears

to

emit

light;

does

not

cast

light

on

objects

(Not

available

for

metal

templates)

Luminance materialappearstobelitbyphotometriclightsource;nolightiscastonotherobjects

Twosided bothsidesofmaterialarerenderedinscene

CreatingandModifyingMaterials(cont)


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Texturemapsaddadditionalrealismtoamaterialbyincludinga2Dimage

ormapprojectedontothesurfaceofanobject

Diffusemap assignsapatternortexturetoamaterialsdiffusecolor(orselecta

proceduralmap)

Reflectionmap simulatescenereflectedonashinysurface(512x480min.)

Opacitymap areasofopacityandtransparency(white=opaque;black=

transparent)

Bumpmap embossedappearance(dark=nodepth;light=projecting)

UsingTextureMaps


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PreviousversionsofAutoCADincludedlandscapeobjectssuchastreesandpeople.

Thosecommandsarenolongeravailable,butyoucanachievesimilarresultsbycreating

newmaterials

using

texture

maps

and

opacity

maps.

UseoldACADimagefiles

Diffusemap:showstree

Opacitymap:whiteissolid/

blackistransparent

OpacityMaps


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Addrealism

by

generating

appearance

of

material

mathematically.

SeventypesnowinAutoCAD

Checker

Marble

Noise

Speckle

Tiles

Waves

Wood

ProceduralMaps


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Youcanchangethewaybitmapsareapplied.

ControlledwithintheScaling&TilingareoftheMaterialspalette

FixedScale bitmapis

scaledtofaceor

objectusinga

fixedscale

Fit bitmapis

scaledtofit

thefaceorobject

ModifyingMapProperties


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Usecontrolstoadjustthescalingandtilingofamaterial

None patternisnotrepeated

Tile patternrepeatsasaseriesoftiles

Mirror doublesmap,flipsthedoubledcopy,andthenrepresentsthedoubled

patternasaseriesoftiles

ModifyingMapProperties (cont)


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Pleaseremember

to

fill

out

your

evaluation

form

Thisis

session GD111

3

Evaluation Forms


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Thisclasswillcontinuewith

RenderingTechniquesin3DAutoCAD,

Part2

GD115

2Hereinthisroomstartingat3:15

To be continued

The Certification is Free.


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e Ce t cat o s ee

The Benefit is Invaluable.

Free Autodesk Certification during AU

No exam fee (worth up to $125)

Get a free, internationally recognized credential

The offer is valid for six months after AU at participatingAuthorized Autodesk Training Centers in Canada and the US

What to do

When you arrived and registered at AU, you received

a voucher that waives the exam fee Go to Zeno 4710, present the voucher, take the exam.

But dont delay. Exam space is limited at AUits first come, first served

Certification exams are available for:

AutoCAD, AutoCAD Architecture, AutoCAD Civil 3D,Autodesk Inventor and Revit Architecture

Get Certified. Get Ahead.

Questions & Answers


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Tocontact

me:

DavidS.Cohn

711ChuckanutDriveNorth

Bellingham,WA982296921

3607330711

mailto:[email protected]

www.dscohn.com (incl.handoutonline)

www.cadmando.blogspot.com

Questions&Answers

This concludes the American Institute of ArchitectsContinuing Education Systems Program


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