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Ray-Traced Shadows — Blender Manual
https://docs.blender.org/manual/en/2.79/render/blender_render/lighting/shadows/raytraced_properties.html
Ray Shadow The Ray Shadow button enables the light source to generate ray-traced shadows. When the Ray Shadow button is selected, another set of options is made available, those options being: Shadow sample generator type. Method for generating shadow samples: Adaptive QMC is fastest, Constant QMC is less noisy but slower.
Area Ray-Traced Shadows — Blender Manual
https://docs.blender.org/manual/en/2.79/render/blender_render/lighting/lamps/area/raytraced_shadows.html
Area Ray-Traced Shadows — Blender Manual Area Ray-Traced Shadows ¶ Adaptive QMC settings. The Area light source can only cast ray-traced shadows. The ray-traced shadows settings of this lamp are mostly shared with other lamps, as described in Ray-traced Properties . However, there are some specifics with this lamp, which are detailed below:
Introduction — Blender Manual
https://docs.blender.org/manual/en/2.79/render/blender_render/lighting/shadows/introduction.html
Ray-traced shadows require more computation than buffered shadows but produce sharp shadow borders with very little memory resource usage. To enable ray-traced shadows, three actions are required: Enable Shadows globally in the Render menu’s Shading panel. Enable Ray tracing globally from the same panel.
Shadows — Blender Manual
https://docs.blender.org/manual/en/2.79/render/blender_render/materials/properties/shadows.html
Renders shadows as materials alpha value, making materials transparent, except for areas where it receives shadows from other objects, and also it retains its own transparency (Fig. Posts with Shadows Only.). Note the faint image of the partly-transparent post. Shadow Only Type. Set the type of shadows used when Shadows Only is enabled.
What is a shadow ray? - Blender Stack Exchange
https://blender.stackexchange.com/questions/23500/what-is-a-shadow-ray
I have read the Blender documentation wikis on both the light path node and on light paths. But neither of them seems to clearly explain what a shadow ray is. For instance, the light paths wiki says: Shadow: the ray is used for (transparent) shadows. It then shows a diagram with the ray labeled “shadow” going (backwards) from a surface to a light source.
Raytraced Shadows — Blender Manual - OpenHMD
http://builder.openhmd.net/blender-hmd-viewport-temp/render/blender_render/lighting/shadows/raytraced_properties.html
Ray Shadow The Ray Shadow button enables the light source to generate ray-traced shadows. When the Ray Shadow button is selected, another set of options is made available, those options being: Shadow sample generator type. Method for generating shadow samples: Adaptive QMC is fastest, Constant QMC is less noisy but slower.
⚓ T31776 triangle artifacts with raytraced shadows - Blender
https://developer.blender.org/T31776
I found that it occurs with any kind of raytraced shadow light, though it's most obvious with area. I tried applying the modifiers, but that didn't help. I tried changing the terrain material to be very basic instead of using nodes. I tried changing raytrace shadow settings, but could not get rid of it. It occurs the same on version 2.62.
Blender 3D: Noob to Pro/Ray Tracing - Wikibooks, open books for …
https://en.m.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/Ray_Tracing
Go to the Materials context in the Properties window. Find the Transparency panel, and check the box at the top to enable transparency. In the row of buttons for selecting the type of transparency just below that checkbox, titled “Mask”, “Z Transparency” and “Raytrace”, select “Raytrace”.
Chapter 9- Ray-Tracing - Central Dauphin School District
https://www.cdschools.org/cms/lib/PA09000075/Centricity/Domain/81/5th-Chapter_9.pdf
With ray-tracing, all Blender lights can cast shadows if you desire. Ray tracing can produce some stunning effect, but can come at a high cost in rendering times. Use it only where needed. Don’t try to ray-trace everything. The professionals don’t even do that. Watch any 3D show on T.V. and you will see it being used selectively. You can get some great shadow and texture effects with …
Camera Tracking and adding shadows from real world objects in Blender
https://www.youtube.com/watch?v=K2EzdtRwmRQ
Not quite CNC Router related, this video is just showing off some exciting things I learned about Blender 3d while working on the "What is a CNC Router" vide...
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