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Under the Sea
Under the Sea
Comments: 5
bullit35744

07.12.2021, 11:22








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With an old bottle
With an old bottle

            

With an old bottle
Description: Bryce 7 Pro. Premium TA 256 rpp render with soft shadows. The render time is 4:08:05.
Lighting: HDRI, Spotlight, Radial Light.
Modeling: Bryce, Wings 3D.
File size 17.8 MB.
Added by: slepalex
Keywords: Bryce, Wings 3D, Instancing Lab, TA, still life, grapes, lemon, dishes
Date: 12.17.2020 16:54
Hits: 354
Downloads: 6
Rating: 0.00 (0 Vote(s))
File size: 409.5 KB
Previous image: With an old bottle 2
Next image: Field bouquet



Author: Comment:
slepalex
Member

Join Date: 10.15.2010
Comments: 885
SSS

For the last two months I have devoted myself to researching and creating subsurface light scattering, which in principle does not exist in Bryce. Generally speaking, this is not the first time I have done this with varying success (or failure).
In white (green) grapes, I applied Rashad Carter's method, namely: in the Transparency channel in the source D of the texture, I set the alpha channel to absolutely black. In the Transparent and Volume channels, using the HLS palette, I set the necessary hue, brightness and saturation so that there is only a hint of translucency of the material. I've done this trick before, but it's not enough. Much also depends on light sources and ambient light. The fill light here is provided by an HDRI that I created from Bryce Sky. The main light to the right of the Spotlight (100% soft shadows).
In painting and academic drawing there are concepts: flare, partial shade, shadow, reflex and falling shadow. Almost all of these concepts are automatically formed in Bryce with a competent approach to stage lighting. But not a reflex. Since there is no radiation transfer in Bryce. The TA effect is practically absent in this case. For example, a reflex on lemons and grapes and other objects from a table surface or from a background surface. To simulate this, I added another Spotlight to the left, slightly behind the background and just below the stage. In this Spotlight, the drop shadow property is disabled so that the light from it penetrates objects. Diffuse value 1 to 2, specular = 0, falloff = none, Edge Softness = 15-20, yellowish (warm) color.
The basic ABC texture is structured as follows. Grapes, as well as some other fruits (for example, plums), have whitish matte areas on which the glare is very weak and bright glossy areas that glare very strongly. In source A, textures are loaded from DTE with a matte light shade, in source B - a bright glossy shade. The alpha channel of the C source has transitions from black to white and controls the mixing and separation of textures A and B. The Specularity channel is controlled by the alpha channel of the C texture in such a way that the whitish color of the berries glares weakly, and bright saturated areas give full flare. Since the Specularity channel is driven by a black and white image from the alpha channel, its numerical value does not matter.
You can see what came of it on the monitor.
If my google translator messes up something, then correct me. :-)
12.17.2020 18:22 Offline slepalex slepalex at yandex.ru
Horo
Admin

Join Date: 05.26.2004
Comments: 4717
-

Really amazing results, thank you for sharing how you accomplished this level of accuracy. Bryce is indeed a very versatile tool to create such a level of detail but it is not given by just a few clicks. It needs understanding how real objects reflect and absorb light and then knowledge how to emulate it with the tools at hand and finally the patience to fine adjust.
12.18.2020 08:45 Offline Horo h.-r.h.wernli at bluewin.ch https://www.horo.ch/
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