Pixel Joint Forum: Translucency

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EyeCraft
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Joined: 07 July 2005
Location: Australia
Online Status: Offline
Posts: 425

Topic: Translucency
Posted: 12 December 2005 at 5:55pm

Having a bloody hard time wrapping my head around the concepts of light interacting with translucent objects, specifically ice. Had a little crack at trying to pixel an ice stallictite, but it looked VERY crap, hahaha.

So could anyone shine any light (

) on the subject, or provide any tutorials for it? I would greatly appreciate it.

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PixelSnader
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Not a troll!

Joined: 05 June 2014
Online Status: Offline
Posts: 3194

Posted: 12 December 2005 at 6:38pm

i am working on an image right now that'll be a very good example of translucensy, and i'll show you when its don and submitted to the gallery

but for now i can say this:

when light hits a translucent object at a straight angle, it goes straight through the object (if the object is just a cube with straight edges)

however, then lightbeams are more tilted when they hit the object, they will start to reflect on the surface. every substance has its own angle that is the breakpoint between shining through and reflecting, but in pixels i think a 45 degree would most likely be good enough

more info on reflection is here:
http://galileo.phys.virginia.edu/classes/usem/SciImg/home_fi les/introduction.htm

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EyeCraft
Commander

Joined: 07 July 2005
Location: Australia
Online Status: Offline
Posts: 425

Posted: 12 December 2005 at 8:49pm

Ah yes, I actually got an ice cube out of the freezer and had a good look at it, but its all straightish edges, whereas the stallictites im working on are like cones, so its way more confusing, hahah.

I did manage to make some pretty good looking stuff however, screenshot:

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PixelSnader
Commander

Not a troll!

Joined: 05 June 2014
Online Status: Offline
Posts: 3194

Posted: 13 December 2005 at 7:49am

here's an old stalagmite i once made for some game i never heard about again =P

looking back on it its not that good, but maybe some help anyways

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PixelSnader
Commander

Not a troll!

Joined: 05 June 2014
Online Status: Offline
Posts: 3194

Posted: 13 December 2005 at 7:27pm

and here's the finished thing i was talking about, maybe usefull fo reference:

http://www.pixeljoint.com/pixelart/7368.htm

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Author	Message
EyeCraft Commander Joined: 07 July 2005 Location: Australia Online Status: Offline Posts: 425	Topic: Translucency Posted: 12 December 2005 at 5:55pm
	Having a bloody hard time wrapping my head around the concepts of light interacting with translucent objects, specifically ice. Had a little crack at trying to pixel an ice stallictite, but it looked VERY crap, hahaha. So could anyone shine any light () on the subject, or provide any tutorials for it? I would greatly appreciate it.
	IP Logged

PixelSnader Commander Not a troll! Joined: 05 June 2014 Online Status: Offline Posts: 3194	Posted: 12 December 2005 at 6:38pm
	i am working on an image right now that'll be a very good example of translucensy, and i'll show you when its don and submitted to the gallery but for now i can say this: when light hits a translucent object at a straight angle, it goes straight through the object (if the object is just a cube with straight edges) however, then lightbeams are more tilted when they hit the object, they will start to reflect on the surface. every substance has its own angle that is the breakpoint between shining through and reflecting, but in pixels i think a 45 degree would most likely be good enough more info on reflection is here: http://galileo.phys.virginia.edu/classes/usem/SciImg/home_fi les/introduction.htm
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EyeCraft Commander Joined: 07 July 2005 Location: Australia Online Status: Offline Posts: 425	Posted: 12 December 2005 at 8:49pm
	Ah yes, I actually got an ice cube out of the freezer and had a good look at it, but its all straightish edges, whereas the stallictites im working on are like cones, so its way more confusing, hahah. I did manage to make some pretty good looking stuff however, screenshot:
	IP Logged

PixelSnader Commander Not a troll! Joined: 05 June 2014 Online Status: Offline Posts: 3194	Posted: 13 December 2005 at 7:49am
	here's an old stalagmite i once made for some game i never heard about again =P looking back on it its not that good, but maybe some help anyways
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PixelSnader Commander Not a troll! Joined: 05 June 2014 Online Status: Offline Posts: 3194	Posted: 13 December 2005 at 7:27pm
	and here's the finished thing i was talking about, maybe usefull fo reference: http://www.pixeljoint.com/pixelart/7368.htm
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Topic: Translucency