Rendering in V-Ray
4.2 V-Ray Frame Buff er Parameters
4.2.1 RGB Color/Alpha
Th e drop-down list displays the render in red, green, blue colour space and the alpha channel. Th e drop-down menu displays other channels included in the render elements.
4.3
Rendering in V-Ray
4
To view any of the listed channels, click and choose from its drop-down menu.
▶4.4
4.2.2 Switch to RGB Channel
Th is button allows users to switch to the RGB channel colour display (default).4.2.3 Red/Blue/Blue Channel
Th ese three buttons enable the users to view all render channels (default) or individually by selecting/deselecting each button. Th ese functions are enabled by default.4.2.4 Switch to Alpha Channel
Th is button allows users to view the Alpha channel in the frame buff er.4.2.5 Monochromatic Mode
Th is button turns the RGB color mode into a monochromatic one. Th is tool is quite useful to assess the overall scene contrast (e.g. visible contrast between dark and bright areas). ▶4.54.2.6 Save Image
Th is button enables users to save the image currently being displayed in the frame buff er. Clicking this button will prompt the Save Image dialogue, for users to choose a path location, the fi le
4.4
4.5
4.6
3D Photorealistic Rendering
4.2.7 Save All Image Channels
Th is button automatically saves all image channels listed in the frame buff er drop-down menu list (without having to select them individually).Clicking the button will prompt its dialogue, for users to type in the fi lename, choose a location to save fi les into and the fi le extension. ▶4.7
4.2.8 Load Image
Th is button allows users to locate and load an image into the VFB. Users can choose to load from any of the listed fi le types. Th e default type is V-Ray image fi le (*.vrimg). ▶4.8
4.2.9 Clear Image
Clicking this button clears/deletes all channels being displayed in the frame buff er.
4.2.10 Duplicate to MAX Frame Buff er
Th is button duplicates the image/render displayed in the frame buff er. ▶4.9
Th is button/function is also used to check the fi nal gamma output in the render.
If the duplicated frame buff er has a diff erent gamma value from main frame buff er (e.g. darker or brighter), it’s an indication that the gamma output needs adjustment.
4.7
4.8
4.9
Rendering in V-Ray
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To adjust the gamma output, click on the Customize button from the main toolbar and choose the Preferences option from the drop-down list. ▶4.10
In the Preference Settings dialogue, set the gamma value to 2.2. ▶4.11
4.10
4.11
3D Photorealistic Rendering
In addition, when saving the fi nal render output, set the Gamma option to Automatic (Recommended). ▶4.12
4.2.11 Track Mouse while Rendering
When selected, this function allows users to use the mouse to control the areas of the frame buff er the buckets should render. Essentially, the rendering buckets follow the mouse (as they fi nish computing the last bucket) on the frame buff er. ▶4.13
4.2.12 Region Render
Th is function allows users to draw a region to render, on the frame buff er.
It works best when there’s already a previous render in the frame buff er.
Th is V-Ray function overrides the region render from 3Ds Max ( Common tab). ▶4.14
Rendering in V-Ray
4
Th e region render function from 3Ds Max allows users to draw a region to render in the actual viewport. ▶4.15
4.2.13 Stop
When enabled it abruptly stops the rendering process.
4.2.14 Render Last
It re-renders the area that was rendered last.
4.2.15 Show Corrections Control
Th is button opens up the Color corrections dialogue.When enabled, users can adjust/
correct many aspects of the image using Photoshop tools such as Exposure, Hue/Saturation, Color Balance, Levels and Curve.
Th ese Photoshop tools are used in the same manner as depicted in Chapters 9, 12, 16 and 19. ▶4.16
4.2.16 Force Color Clamping
When enabled, it forces the colour clamping in the frame buff er. Clicking and holding this button will give users the option to see the clamped colour in the frame buff er.3D Photorealistic Rendering
4.2.17 Display Colors in sRGB Space
When enabled, it displays the render in sRGB colour space. Users can click and hold its button to select ICC colour space .
Th is function is enabled by default.
▶4.19 and 4.20
4.18
4.19
4.20
Rendering in V-Ray
4
4.2.18 Show VFB History Window
Clicking this button opens up the Render history dialogue. Th e dialogue allows users to show the history of all renders, save them, remove them, etc. ▶4.21To begin saving the images into the Render history dialogue, fi rst click on the History settings button, to bring up the Render history settings dialogue.
Enable the Auto save function and click on the VFB history temp path toggle, to bring up the Browse for Folder dialogue.
Choose the path location and click OK to close the dialogue.
▶4.22 and 4.23
4.2.19 Stereo Red/Cyan
When enabled, it allows users to see the stereoscopic preview. Clicking and holding its button enables switching between other stereoscopic modes.
4.2.20 Open Lens Eff ects Settings
Clicking this button opens up the Lens Eff ects dialogue4.21
4.22
4.23
3D Photorealistic Rendering
Parameters such as Bloom Eff ect , Intensity , etc., need to be turned on prior to sending a render, in order to utilize many of its interactive
parameters. Th is function is disabled by default. ▶4.24
4.2.21 Get Resolution from Max
Th is option uses the Output Size values from the Common tab, to render the frame. If disabled, thegreyed out parameters will become live and allow users to manually type in the image aspect values, pixel aspect, etc. Th is function is enabled by default.
4.2.22 V-Ray Raw Image File
When enabled, this option renders the raw image format directly into the disk (bucket by bucket as the render progresses). Th is feature is quite useful when rendering extremely high resolution images that may cause the VFB to crash during the rendering process.
Disabling the Memory frame buff er function whilst using this option will render the high resolution images.
Th e Generate preview function allows users to have a small preview of the render in progress.
Th e browse toggle allows users to fi nd a location to save the VRIMG fi le.
Alternatively, users can choose other fi le formats, such as EXR, etc. EXR fi le formats save the render elements into the fi nal output fi le
automatically. ▶4.25
4.24
4.25
Rendering in V-Ray
4
Th e V-ray raw image fi le can only be opened inside 3ds Max. To do so, go to the Rendering main toolbar and choose the View Image File option from the drop-down list. Th en open the desired image. ▶4.26
Once the V-ray raw image fi le is open in 3ds Max, users can save it as a diff erent fi le format.
Th e EXR fi les can be opened in Photoshop. ▶4.27
4.26
4.27
3D Photorealistic Rendering
Alternatively, you can open the EXR main render and its elements in 3ds Max, one at a time, and then save them in a diff erent fi le format.
▶4.28
4.2.23 Separate Render Channels
When enabled, it determines the path/location of the ticked render channels, aft er being rendered.
Th is function also saves the channels added in the Render Elements list. ▶4.29