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Author Topic: Max reflections  (Read 7412 times)

KiwiNM8OR

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Max reflections
« on: September 16, 2008, 07:43:39 am »

I've been experimenting with the number of reflections glossy reflector can do and I think I've hit the limit but ya never know - somewhere out there in Anim8or Land someone can probably do better...
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thecolclough

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Re: Max reflections
« Reply #1 on: September 16, 2008, 10:52:14 am »

i also noticed the ceiling reflections look a bit broken in places, ie. the hemispheres aren't fully shown in some cases.  is that a deliberately designed feature of the scene, a design flaw, or a program bug?

- colclough
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KiwiNM8OR

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Re: Max reflections
« Reply #2 on: September 17, 2008, 07:37:44 am »

I'm not too sure myself. I suspect a design flaw because I accept that at a programming level I don't understand exactly how the reflection process works. But I have had that flaw in other experiments. It could be an alignment of the mirrors too. I started off with a sphereinder with a flat top and base and experimented with different numbers of sides to see what offered the best reflections. Therefore the top and base are not "flat" but divided (like a pie chart) according to the number of sides. I'm not sure if that makes a difference but that was how it was made. In this example I just used 4 (flat, not divided) sides. Then I used Edit=>Subdivide faces a few times so that I could then use the taper modifier to "lift" the view of the ground grid in the distance. In Scene mode it is rendered with a FOV of 90 degrees. The file is there for interest and inspection. Cheers for the view.
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Steve

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Re: Max reflections
« Reply #3 on: September 19, 2008, 06:17:57 am »

The max level of reflections (and all other things like refraction, etc.) is set to 12.  But I'll add an attribute "RayDepth" that you can set to change the level.  Here's your image with the value set to 64 (but I think a value of 30 or so would give the same result).

Note: dielectric materials become horribly slower as the max depth increases, up to a factor of two for each increase of RaDepth by 1.  Be careful how you use this new setting when it's available.
« Last Edit: September 19, 2008, 06:23:15 am by Steve »
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KiwiNM8OR

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Re: Max reflections
« Reply #4 on: September 19, 2008, 09:44:47 am »

Awesome Steve. Cheers very much. I like the improvement. Looking forward to the update.
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thecolclough

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Re: Max reflections
« Reply #5 on: September 19, 2008, 10:38:14 pm »

...and so we finally see kiwiNM8or's original vision, in all its glory.  looks great.  roll on 0.97d, steve!
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KiwiNM8OR

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Re: Max reflections
« Reply #6 on: September 20, 2008, 08:50:45 am »

Now that I know that currently the RayDepth is set to the default of 12 I can shape my current experiments more effectively knowing the actual setting. Cheers.
 
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Steve

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Re: Max reflections
« Reply #7 on: September 21, 2008, 12:44:26 am »

I almost have the v0.97d update ready to post.  It will support user settable max ray depth plus ambient occluders.  For an example of what they can do, I am posting an image that has no lights, but uses ambient occlusion an ambient intensity of 3.14 to treat the whole sky as a light.  It takes a lot of samples to get rid of the noise for this.  One image uses 64x AA and the other uses 256x.
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karate5662

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Re: Max reflections
« Reply #8 on: September 21, 2008, 11:58:59 pm »

maybe steve should have a thread for all the test renders with the next version.
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Darkjesture

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Re: Max reflections
« Reply #9 on: September 22, 2008, 12:12:02 am »

How are you guys making these reflections?
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KiwiNM8OR

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Re: Max reflections
« Reply #10 on: September 22, 2008, 03:35:02 am »

Darkjesture : rather than explaining here please follow this link where I have provided an explanation there. Cheers for your interest. http://www.anim8or.com/smf/index.php?topic=1064.0

Thanks again to Steve for your attention in this area

Also some examples by thecolclough can be found at : http://www.anim8or.com/smf/index.php?topic=1288.msg9394#msg9394
« Last Edit: September 22, 2008, 05:02:57 am by KiwiNM8OR »
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Darkjesture

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Re: Max reflections
« Reply #11 on: September 22, 2008, 04:14:21 am »

Wow thats insightful i didnt know you could do that ;)
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VBSmiles

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Re: Max reflections
« Reply #12 on: September 22, 2008, 06:14:24 am »

Cartoon madness :)

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onespirit5777

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Re: Max reflections
« Reply #13 on: September 23, 2008, 02:28:04 am »

just having some fun
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onespirit5777

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Re: Max reflections
« Reply #14 on: September 24, 2008, 03:38:54 am »

I've tried playing with RayDepth but not doing something right.

do the settings go under

float, int, ?
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