Basic techniques for vray advanced

Page 1Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com/VRAY/Tutorial.htm Basic Techniques For Vray Advanced This tutorial is intended to get you started using Vray. If you find something that you think I need to change please email me. Here are some other sites with Vray tutorials that I find useful: www.chaosgroup.com/support (you will have to register) click on "V-ray docs" and open the Help Index. www.aversis.be www.vray.info www.evermotion.org VRAY Forums Click on a link to jump to that section or start on section one below. 1. Exterior Lighting 2. Environment Adjustments 3. Night Scene 4. VRAY Light Material 5. Color Bleeding 6. VRAY Toon 7. Interior Lighting 8. HDRI Lighting 9. Basic Material Settings 10. VRAY Displacement 1. Exterior Lighting Page 2Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com/VRAY/Tutorial.htm _ 1.1 Download Basic_VRAY_Tut_Start.max 1.2 Render the scene. You should get something silimal to the image above. Here are the basic VRAY settings I use for exterior Lighting: < Turn off Default Lights. < Use Adaptive Subdivision (for now) - < Make sure GI is turned ON. Page 3Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com/VRAY/Tutorial.htm < Primary Bounces: Irradiance Map (IR Map) < Secondary Bounces: Quasi-Monte Carlo (QMC) < GI Environment : Check Override Max's and set color to the ambient color of your choice (Scene Dependant) < Reflection/Refraction: Check Override Max's (this isn't important now but it will be for HDRI lighting) < QMC Sampler: these settings may be a little high for now but we'll get into that later. < Current Preset: Set this to custom. < Make sure the settings are the same (note these settings are optimized for fast render times) Click show calc phase if you want to see what VRAY is doing during the IR Map passes. < Advanced Options: Blah, blah and more blah. < Leave this alone as well < Sure why not? 2. Environment Adjustmnets Page 4Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com/VRAY/Tutorial.htm Here is an example of what can happen to a scene if the environment is too high. As you can see the entire image looks blown out and oversaturated. Setting the GI environment to .6 caused the result above. Note: The "blown out" effect is also due to the Target direct Light in the scene. In combination with lights, high GI Environment multipliers can cause unwanted results. By contrast it is possible to light a scene using only the GI Environment. 2.1 Increase the GI Environment Multiplier to 1.0 and turn off the Target Direct Light (Direct01) 2.2 Render the scene Page 5Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com/VRAY/Tutorial.htm As you can see this approach produces shadows that are very soft and undefined. This method may work for you depending on the look you are after. You can add a bitmap to the GI Environment by clicking "None" and browsing to a bitmap of you choice. (Adding a bitmap to the GI environment is similar but but the same as HDRI lighting which we will cover later on) 3. Night Scene Even on the darkest nights in the middle of nowhere there will always be some sort of "ambient light" (varying degrees of course). Light from the stars, moon, or like in many night scenes, light from surrounding buildings and gereral "civlilization" can create enough ambient light to see an object even if the object has no light source of its own. (All of this depends on the scene you are rendering) A good way to get this general ambient light is to use the GI environment. Page 6Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com/VRAY/Tutorial.htm 3.1 Set you GI Environment to .4 and pick a similar color to the one below. 3.2 Make sure the light Direct01 is off and then select and turn on the light "Inside Omni". This light simply provides some interior lighting so its not so dark. 3.3 Render the scene and you should get something similar to the image above. 4. VRAY Light Material Page 7Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com/VRAY/Tutorial.htm The VRAY light material allows you to create a light out of any piece of geometry. I applied a VRAY light material to the sphere on top of the structure. 4.1 Open the Material Editor (M), click on an empty material slot and click the top right button that says "Standard". (If the button says VRayMtl then you didn't select an emty slot) 4.2 When the Material/Map browser opens select VRayLightMtl near the bottom of the list as shown below: Page 8Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com/VRAY/Tutorial.htm Back in the Material editor you can adjust the settings of your Vray Light material. Play with the color and multiplier to get the desired results. Page 9Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com/VRAY/Tutorial.htm Aslo you can use a standard MAX material with self illumination to produce geometric lights. See Example below. The curving tube has a rainbow bitmap in the map slot under self illumination. The material is a standard MAX material. 5. Color Bleeding 5.1 Turn off the light "Inside Omni" and turn on the Light "Direct01". 5.2 Under VRay Environment, adjust the GI Environment as we had it before when we made the direct sunlight renders. Give the multiplier a value of .3 and adjust the color back to a light yellow. 5.3 Select the sphere on the top of the structure and assign the "Yellow1" material to it. 5.4 Render the Scene and you should get a result similar to the image below: Page 10Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com/VRAY/Tutorial.htm Roll over the image to see the effects of color bleeding. Light is bouncing off the sphere and onto the surrounding objects. Though this effect does happen in the real world, I often see it over exaggerated in renderings. You can desaturate your materials (or their corresponding bitmaps) to lessen this effect. 6. VRAY Toon 6.1 From the top menu click Rendering then click environment (Or just press "8") This brings up the Environment and Effects Dialog box. [...]... should be similar to the image above Settings for the glass: http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 26 Settings for the water: http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial http://www.joepizzini.com /VRAY/ Tutorial.htm Page 27 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 28 Note: I used the turbulance... the Atmosphere rollout select VRay Toon from the Effects list With VRay Toon selected click the delete button For this example of interior lighting we want the VRAY Toon effect turned off 7.3 Select Pane01, right-click in the viewport and select VRay properties: http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 13 7.4 With the VRAY Properties box open check... itself 10 VRAY Displacement No steps to follow here just some examples and settings A plane with a VRay Displacement map applied to it Here is the plane without the VRay displacement Map http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 32 Plane with displacement This is the Map : http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY. .. to zero http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 35 3 Apply a VRay Displacement modifier http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 36 4 Adjust the settings to match the image below: In the common params, highlighted in yellow, there is a button to add a bitmap for displacement This is where I added... http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 19 8.2 Render the scene You should get something similar to the image below The scene is lit only by the light Direct01 and GI bounces http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 20 8.3 Press "M" to open the Material Editor Click on theVRay HDRI material in the... http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial http://www.joepizzini.com /VRAY/ Tutorial.htm Page 30 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 31 The refraction glossies has been lowered to.95 I find this to be a little counter intuitive, but to increase glossieness you have to lower the spinner Note the increase in render time For animations you might... panel http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 15 7.7 Turn on VRayLight01 by clicking the checkbox under the Parameters rollout The other five VRAY lights in the scene are instances of Light01 and should turn on as well Make sure "Invisible" is checked If it isn't, the light from Direct01 won't be able to pass through the VRay Lights 7.8 With the lights... below: http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 16 The image looks somewhat grainy with the default VRay Light settings To correct this we can change some settings in the VRay QMC Sampler rollout 7.9 Open the Render Scene dialog box if it isn't open already (press F10) 7.10 Click the Renderer tab and scroll down to the "VRay QMC Sampler" rollout and... reflections (Useful for studio lighting setups) We did this so that the ground plane wont show up in the interior render (Also to explain Vray object properties) There are many useful settings in the VRay object properties box their labels are self explanitory 7.5 Render the scene It should look like the image below: http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial... http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page 24 9.1 Give the Green, Red and Yellow1 materials a light grey color in the reflection slot You can copy the color by right clicking the color and pasting it into the reflection slots of the other materials See image below http://www.joepizzini.com /VRAY/ Tutorial.htm 2006/08/01 04:24:24 ‫ب.ظ‬ Basic VRAY Tutorial Page . Page 1Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com /VRAY/ Tutorial.htm Basic Techniques For Vray Advanced This tutorial is intended to get you started using Vray. If. Lighting 8. HDRI Lighting 9. Basic Material Settings 10. VRAY Displacement 1. Exterior Lighting Page 2Basic VRAY Tutorial 2006/08/01 04:24:24 ب.ظhttp://www.joepizzini.com /VRAY/ Tutorial.htm _ . 1.1 Download Basic_ VRAY_ Tut_Start.max 1.2 Render the scene. You should get something silimal to the image above. Here are the basic VRAY settings I use for exterior Lighting: