rendering cuts through model

[FlytE]

This is going to seem like a silly quesiton, but whats the best way of going about rendering a cut render like the ones attached? I am having problems getting light to penetrate through the windows, but not through the cut. Do i have to render different views of the irradiance map inside then complile them? Any advice would be great.

[FlytE]

true to form, other than a few bugs in the model i have done what i usually do and figured it out just after i posted.

 

So for those that are interested and dont already know:

 

1) Select all outer walls and anything that will cast shadows into your interior, and in their properties make them not renderable.... thereby letting all the direct sunlight into your model.

 

2) Render your irradiance map. This will render sunlight both where you want it, and where you dont want it on your interior.

 

3) Make all the walls etc renderable now (ie so they will cast their shadows) and render the irradiance map as 'incremental add to current map'. This will keep the sunlight you want, but remove the light that is now in shadow from the walls.

 

4) Once your irradiance map has rendered go back into the properties of all your external walls again and set uncheck 'visible to camera'. This opens your model back up so you can see inside.

 

5) Do the final render using the saved irradiance map. Now you will see the light on the floor from the window openings only, but no extra light in the interior by the removal of the outer walls.

 

I might write a proper tutorial on this if I get a chance.

[dynaman]

i did one recently that looked pretty good. all i did was set up the slice plane on the camera, then place a large planar light just towards the camera side of the slice plane. that was enough to create a balanced ambient light throughout the interior; exterior openings and interior fixture lighting added hilights to the overall lighting. since these types of images are diagramatic in a sense, the rendering looked fine, if not 100% physically accurate. the wall cuts have to be filled in photoshop, or i suppose you could creatively use the slice tool / cap holes to cap the cuts.

[AJLynn]

Since those are section-perspectives, in most cases isn't it easier just to give the camera a clipping setting and poche in post?

[Sawyer]

I did a pretty complex section a while back. I bought a better slice tool Scalpel Max but tehn all I had to do was make a copy of the object, flip the slice and in properties turn it invisible to camera. It rendered shadows an occluded light but didn't see it.

 

I agree with Andrew for this just use camera clipping planes

[FlytE]

yes interesting. Although, the angle i am working from is 45 degrees and from above (to see into a basement level) but since discovered that i can animated the camera clipping plane.... should be interesting. Thanks for the suggestions.

[HomeBrewTJ]

Those are all really good suggestions. I'll have to try this.

[sMs]

very nice..

and yes u should write a tutorial about it...

im interested

[FlytE]

camera clipping plane is fine, but it is only good for those straight on perspectives. Theres 3 problems with this.

 

1) My camera is now at an angle, and I need the clipping plane to clip the top off the model

2) I need this animated, so the model disappears from top to bottom

3) Im using viz

 

I cant animated a slice and I cant seem to find another way to do it other than move that slice manually and render frame by frame. Sawyer, will that scalpelmax tool work with viz do you think?

[alfienoakes]

Andy,

 

Images look nice..

 

So this would allow you to animate say, and external shot of a building, then fade the one external wall away, and view the contents of the building, with accurate lighting..??

 

If you are animating it.. If not, you get a really cool "clipped" effect of the building.

 

Andy

[sMs]

HI FlytTe

 

i need ur help... i need to do something like this due for friday..

 

my model is done...

my questions are:

 

do u use skylight to illuminate ur interiors? or r u using some vray lights? at this moment im using skylight (intensity 20).

 

should i change it to intensity 1 and use some vray lights to illuminate the interior...??

 

im using irrandiance and light cache .. shoud i save the settings for both? or just the first bounce render (irradiance)..

 

r u removing only the front wall? (the wall u used to cut it trough) or do u need to remove all the exterior walls?

 

can u explain me again how to do this.. im not pro using vray.. can u use simple words so i can udnerstand... hope u can help me out.. thanx

[Hoa Dinh]

you can untick "visible to camera" the wall you want hide it, in properties that opject, I'm not sure that what you want to do

[sMs]

you can untick "visible to camera" the wall you want hide it, in properties that opject, I'm not sure that what you want to do

 

mmmmmmm untick visible to camera? will the wall be rendered? if not.. is the wall going to cast shadow like a normal object? is the wall going to block the skyligth?

 

 

thanx in advance

 

[sMs]

you can untick "visible to camera" the wall you want hide it, in properties that opject, I'm not sure that what you want to do

 

it worked =D well i think.. let u know later

[sMs]

yes it worked... thanx!

 

one question... how can i tell 3ds max to use all my memory (ram)

 

i have 3 gbs of ram... but .. well

there was an error .. about allocated memory... when i tried to render all my scene (rednering cuts trought model).

any ideas.. how to push it to its limit.

[sMs]

looking for a great architec font, i would like to use it with autocad and 3ds max..

suggestions?