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Introduction Shadow Analysis Materials Settings Creating Materials Materials Editor RPC Content & Creation. Camera Setups – Perspective Views Raytracing and Radiosity. Render Scene Setups –External Camera Setups – 3D Elevations Render Scene Setups – Internal Flythroughs –Basic General - Tips and Tricks Questions Rendering with REVIT Introduction

RTC Handout - Rendering.pdf

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Page 1: RTC Handout - Rendering.pdf

• Introduction• Shadow Analysis• Materials Settings• Creating Materials• Materials Editor• RPC Content & Creation.• Camera Setups – Perspective Views• Raytracing and Radiosity.• Render Scene Setups –External• Camera Setups – 3D Elevations• Render Scene Setups – Internal• Flythroughs –Basic• General - Tips and Tricks• Questions

Rendering with REVIT Introduction

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Accurender

Steven FiorioAltis Architecture

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- Shadow Analysis

STILLS- Duplicate Site plan.-Turn off unnecessary modelled elements or annotation…TIP:Keep imported survey plans to show adjoining buildings.-Rename view with logical name to suit eg SD 9am 22June Proposed Ground Floor- Duplicate settings, rename in accordance with view name, and adjust settings accordingly - Turn shadows on and adjust crop regions.- Duplicate this for all required shadows- Place on sheets.

ANIMATED SINGLE DAY- Select ‘Single Day ‘ Tab- Duplicate settings, rename in accordance with view name, and adjust settings accordingly - Adjust settings required.- Preview Solar Study or Export AVI file

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- Material ‘Appearance’ settings

- Materials dialogue box is the location where all materials is stored.SHADING: Material / colour used in shaded views.ACCURENDER: Material used in raytraced rendered views.SURFACE PATTERN: Pattern of object faces in elevation.CUT PATTERN: Pattern of cut objects in section.

TIP: - These materials should be kept to approx 40 of the most used in your offices template file.- Surface / Cut patterns use data stored in ‘Filled Pattern’. These should also be office template specific.

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- Creating Materials

- Select Duplicate and Name the Material in a logical name.Select Accurender menu arrow.Select Material ‘New’ (or right mouse click – new).

-TIP: -Sometimes is easier to start with a default grey material than editing an existing material.

-‘User’ defined materials are stored in the default C:\Documents and Settings\All Users\Application Data\Autodesk\Revit Building 9.1\Rendering\AccurenderRedist\Support\user.mlibuser.lib and backup regularly

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- Material Editor

- Main = Colour properties- Transparency = Transparency - Maps = applied texture maps jpgs to materials- Highlights = adding shine and gloss

-TIP: Use your digi camera, and take photo’s of realistic materials for use in renderings. Store these jpgs in a separate folder than the standard Revit ones and begin a library of images.

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- RPC Content- Use RPC content for more realistic renderings.Purchase libraries of trees and people for the final touches- Load these as families and adjust as necessary eg: People, Trees

-TIP: -Use landscaping content sunken into the ground for hedging or bushes, so that only the bulky crown of trees are visible or elevate to show tops only.

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- Camera Setups Perspective Camera Views

- In a Plan View select camera in the View Menu, click to place location of camera and then view depth. Generally perspective view will be generated automatically. TIP: -Rename views accordingly, do not leave as default ‘3d View x’.

-Keep an eye on the changing command lines

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START

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- Camera Setups Perspective Camera Views

-Adjust view crop regions with blue tabs, this stretches the camera’s field of view.

TIP: - Be careful not to adjust these too much as view may become verydistorted, and use ‘Show Camera’ to see view extents in plan.

- Adjust view characteristics itself with ‘Dynamically modify view (F8)’

TIP:- Great for those internal construction views and finding conflicts, eg stairs landings, voids, beam head heights

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- Raytracing vs Radiosity

Raytracing- SINGLE beam path of light calculated FROM camera TO light source. No secondary reflection.- Sharp, accurate sunlight shadows.- Excellent reflections and highlights.- Realistic metals and textures.- Can be faster than radiosity for complex scenes, with RPC components.

Radiosity- MULTIPLE beam paths of light calculated TO camera FROM lightsource. Has secondary reflections.- Better image quality architectural interiors with accurate artificial lighting and secondary lighting ‘bounce’- More accurate distribution of light with more realistic colour shading ‘bounce’- Can be much slower for complex scenes.- Excellent night time scenes.- More setup time- After Radiosity has been done , the scene still has to be Raytraced.

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- Render Scene Setups -Exterior- Use appropriate names ie 3pm -22 June.- Select Interior or Exterior. Generally Exterior scenes render quicker than interior. If more lighting effects are required use interior.- Environment: settings for background colours, or project specific JPGS. Advanced section adds more tabs as selected.- Lighting –List of lights that are used.- Sun –Sun settings as desired.- Back Face Culling –Removes rendering of model faces that lie outside the view of the camera decreasing rendering time yet quality low.- View Culling –Removes rendering model faces that lie outside the area to be raytraced.- Radiosity Settings: Draft, Medium, Good, Better, Best.- Solution Goal –The max number of steps to calculate radiosity.- Colour Bleeding – Controls colour saturation of the reflected light.- Raytracing: Draft, Medium, Good, Better, Best. Quality of anti-aliasing. (The process where more than one ray is shot for each pixel) increases considerable rendering time. - ‘Soft Shadows’ produces more realistic edges. - ‘Blurry Reflections’ affects the look of reflections in glass. - ‘Blurry Transparency’ effects the look of material seen behind glass. - ‘Reflection and Transparency bounces’. These values determines how many levels of reflections or transparencies are permitted = longer rendering times.TIP: - When using RPC content and black sections are rendered, increase the Transperency Bounces. - ‘Recalc Radiosity Lights’ to recalculate the shadows cast during the radiositypreprocess. Very time consuming.

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The Finale- What now?

-Hit the GO button.Use the ‘Adjust Image’ dialogue to add finer touches after raytracing finishes by adjusting Brightness, Contrast, Indirect values.- ‘Export image’ to JPG or ‘Capture Image’ to remain in Revit File.

TIP: - Use Capture Image sparingly as this can increase file size dramatically.

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- Camera Setups -3d Elevations

3D orthogonal elevation (if there is such a thing)

In any 3d View , - View Properties check Section Box.Adjust view accordingly to ‘crop’ unwanted elements such as a large site.

In the view menu select Orient, South (in this case), to get the 3d elevation. Adjust render settings for desired effects and Render.

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- Render the Elevation.

-Hit the GO button as before…Use the ‘Adjust Image’ dialogue to add finer touches after raytracing finishes by adjusting Brightness, Contrast, Indirect values.- ‘Export image’ to JPG or ‘Capture Image’ to remain in Revit File.

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- Render Scene Setups -Interior-Create Interior Camera View and name appropriately- Use appropriate names for scene setup- Select Interior and adjust settings accordingly- Lighting –List of lights that are used which can be grouped.Raytrace or Radiosity – You can probably get 4 -5 Raytrace renders compaired to one Radiosity

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- Flythrough Basics?

-View – Walkthough and click path….Keep em simple….-Adjust camera view depth with blue circular tab and camera angle with pink tab….this has to be done with all keyframe points.-Adjust Controls as necessary.-Make camera active and render or export walkthrough

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General Tips-If Elements are rendering grey, check 3d views phase filters are set to ‘Show Complete’.- Focus on one view at a time, and periodically do low res renders to see how its going.- Rendering time depends on:image size: The larger the image, the longer the rendering time.resolution dpi: higher dpi results in longer rendering time. 150 is a recommended dpi value. lights: Rendering time decreases if you turn on only the lights that are required for the scene. For example, in exterior scenes, render with only the AccuRender sun turned on, and all other lights turned off. This improves render performance by reducing the number of lights to calculate.Speed of machine: We’ve found some newer AMD machines are quicker than INTEL.- When taking photo’s for background images try to measure on site distances from where photo’s are taken and at what height, and camera settings.- RPC Content

- Plants: -stick to max ten species -periodically rotate species.-overlap trees and shrubs,-add a mulch zone to border grass ie different material map.-Layer planting as you would in your garden

- People -Don’t use the same guys and girls ( unless you want to have twins, triplets etc everywhere).- Shadows –Turn Off when not in use as this can slow file down dramatically.- Keep materials simple …A few really good materials are better than ten mediocre ones…but if time permits, get em all right…-Glass and water are difficult materials to render, so spend time on these…..- Keep lighting simple…- Radiosity?? Is it worthwhile??? - Plants can help enormously by framing images and covering any hick-ups……

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Questions?

Thanks to a whole lot of people who over the years have helped me to learn Revit, and who have contributed some of the tips and images shown here.

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