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ararat
Comments: 3
catad

27.04.2024, 23:39

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Bottled City

Bottled City
Description:	The bottle is from the Glassware set (once at Daz 3D) and its size adjusted. Near the floor a 2D-Disk with a grass material from "Vegetation". The city is a self made terrain and the material comes with Bryce. The bottle rests on a Fading Disk from "Hypertextures Expansion" (both available at Daz 3D). Light and backdrop by the "Entre" HDRI (unpublished). A city packed in a glass bottle.
Added by:	Horo
Keywords:	IBL, HDRI
Date:	08.12.2023 14:17
Hits:	335
Downloads:	1
Rating:	0.00 (0 Vote(s))
File size:	321.8 KB

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electro-elvis
Member

Join Date: 12.11.2010
Comments: 247

Well done picture. First I am surprised about the material of the city. You wrote "it comes with Bryce". It look quite nicde.
Second the glass material also looks great. What numbers have you used for Maximum Ray Depth and for TIR?

08.12.2023 19:53

Horo
Admin

Join Date: 05.26.2004
Comments: 4721

Thank you electro-elvis. 16 rays per pixel, max ray depth 6 and TIR default. Render time 3.5 hours.

08.13.2023 07:34

electro-elvis
Member

Join Date: 12.11.2010
Comments: 247

It would be interesting to know, if the glass would look differently, when you use a TIR of 2. The default of TIR is, that it is not activated.

08.14.2023 10:07

Horo
Admin

Join Date: 05.26.2004
Comments: 4721

I always though if TIR is not selected, Total Internal Reflection is not limited. I plop rendered a part without TIR, with TIR 1, 4 and 10. I couldn't see a difference, render times were also the same for all tries.

08.14.2023 12:42

electro-elvis
Member

Join Date: 12.11.2010
Comments: 247

As far as I know and also checked with a test picture: When TIR is not selected, the Internal Reflection is not calculated. But often the object is not suitable for calculating TIR at all, which could most probably the case with the bottle you used.

08.16.2023 13:36

Horo
Admin

Join Date: 05.26.2004
Comments: 4721

Thank you again for your comment. You are correct. After my test renders and my previous comment, I spent an afternoon to read about what TIR actually is. Then I made test renders, one is shown in the "Show Us Your Renderers Part12" DAZ forum. It seems to be important that the transitions are at some different angles and the max Ray Depth is high enough that the light can pass trough the the objects. Each surface is not only transparent but also mirrors a part of the light received. This reflection also passes through but at a different angle (Fresnel) and the final render result is usually darker as if when no TIR is used and all surfaces are just transparent.

08.16.2023 14:20

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