a few questions. i have not used pov ray much but i need a little help.

1. how do i take one of my own textures and put it on a model and pov ray it. what is the correct type of texture map i.e. jpeg, etc.

i need to know little things like that or have some quick instructions on this. i have also read the pov ray tutorial but this kind of stuff is not covered as far as i know.

any help would be great.

-korben

also too...
i always export an .avi for video work i do. i usually use a blue or green background so i can key the rendered animation in after effects or premiere. this works fine when not using pov ray. when i render with pov ray the reflections pic up the background as well.

-is there a way to render so as the objects in the scene are effected by pov ray and the background is not taken into effect except as a straight background.

-if neeeded i can post a pic so people can see what's going on. again i just started using pov ray a week ago.

any help plese!

-korben

also too. i know this is probably a stupid question, but is there any way to speed up the render in pov ray. i am sure this is normal but it took me a little over an hour to render a ten second piece of video that had only one object in it with a black background. and by the way i am still having problems with the post above this one.

here are some pics to show what is going on

this first pic is rendered just in 3dcanvas
!NOT using povray! see- it looks fine but can't have the reflections etc. that povray can do.

1.jpg (69 Kb, 302 downloads)

now this is the same test scene but rendered with povray and using reflections. NOTICE that the cube (or what ever polygon) picks up the reflection of the actual background. i need to get around this but still have the ability to have reflections and keep a color backgound so i can chromakey it out later.

any help please!

-korben

2.jpg (60 Kb, 316 downloads)

also i am not rendering the atmosphere. so that can't be a case. WHAT IS GOING ON!!!???

-korben

Here is a real good tut POV basis Someone here found it. Hope it helps, haven't read it yet.
KB
Les will probably have am idea.

I have thought of one way but it it does have problems

in pov you need to tell the material which colours to reflect - so you could set up a red background and add the code so your reflective materials only reflect green and blue. I don't know about the editing software you use for your video but I guess if you do need all colours reflecting then you would need to repeat the sequence with gree and blue background and then combine them together ?

long winded and I bet there is a much better method.....

re fog in above pic - if you turn off ambient light in 3dc then I think it turns on the "fog" fx in pov

please note that I don't use pov much any more so most of this is guesswork

[This message was edited by Alan on Mon March 22 2004 at 02:50 AM.]

well it works in a fashon

dusted off pov and got these results - as you can see in the first one the background red is reflected in the "silver"

red.jpg (53 Kb, 273 downloads) red

in this second pic I,ve removed red from the reflection - but also look at the reflection of the red ball

and the code would go from

texture {
pigment { rgb <0.2, 0.2, 0.2> }
finish {
ambient 0.1
diffuse 0.7
brilliance 6.0
reflection { rgb <0.3, 0.3, 0.3> }
phong 0.8
phong_size 120
}
}

to

texture {
pigment { rgb <0.2, 0.2, 0.2> }
finish {
ambient 0.1
diffuse 0.7
brilliance 6.0
reflection { rgb <0.0, 0.3, 0.3> }
phong 0.8
phong_size 120
}
}

but you would need to do this for all reflective materials in your scene - but if you are using the "default" materials you would only need to edit the "included files" that come with pov.

nored.jpg (63 Kb, 265 downloads) no red

that looks like a good idea alan, and thanks for finding that out. i'll try that, but i will also wait and see what others say. plus i am still waiting on emails from richard-because he is on vaction all of his emails bounced back.

anyway thank you,

-korben

that actually seems to be more trouble than it is worth. there has got to be a thing in 3d canvas that can render the background but not ray trace it with the other elements. if there isn't anything like that there should be.

any help on this subject would be great. and does anyone know when richard is coming back from vaction. because he would know the best.

-korben

another idea....

how about you put a very (very)large cube or plane in the background (way, way back) colour it with your 255,0,255 chroma key colour (chroma key ? is that the right term ?).

I've given this a quick test and it appears to work......

edit

sorry - I should of checked it further - still picking up the "background" (or cube in this case )

maybe but won't the objects in the scene still pic up the reflection though?

Yes, you are right, they are still picking up the reflection - my first try was ok - but once I added a few more objects and moved the camera around the reflections came back

I am sure there must be an easy way to do this.

Have you tried asking on the povray.org forums if there is a way to do this ?

i have not tried that yet. but i think it is on our end-3d canvas. 3d canvas controlls the background so i think it has something to do with 3dc. i am waiting for richard to get back from vacation so i can find out what is really going on. and maybe there is a quick fix he knows about.

let me know if anything changes, and thank you for taking time on this

-korben

This message has been edited. Last edited by: korben,

Sorry I don't know anything about this. It has something to do with backgrounds but I don't know what exactly. You could try reducing the amount of reflection you have.

Richard

do you think that the 3dc to pov ray exporter could have a new line written in that would not include/disable the background- and then put it in the next update. there is a part of the code in 3dc that exports it to pov ray right, because i would imagine there would be? i don't know if there is a way to do this, but it would be a world of help

-korben

but if you remove the background won't you loose the ability to chroma key (or whatever it's called) it into your video ?