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Friday, 19 February 2010

02.2 Concrete Basement Modeling - Video

Below is a link for the modeling of the concrete basement detail, its 28 minutes long but worth a watch, one or two things i left out; i preset the top wall offset to (-1'-0") before drawing the 1st set of concrete walls, and when i'm drawing the profile family the dimensions can be turned into parameters

I also preset some grids and levels; Grid are 19'-6" apart (1,2,3,a,b,c)
Levels are
(02 Level) +12-6"
(FFL 01 Level) +0-0"
(SSL 01 Level 1) -0-3"
(SSL 01 Level 2) -0'-6"
(FFL B1Level) -12-6"
(SSL B1 Level) -12-11"

Concrete Basement Wall Detail - Video 1

Monday, 15 February 2010

02.1 Analysis of Basement Wall Detail - Part 1

Finally i get to move on to the next chapter of my blog, the first 2 months were somewhat of an experiment to find the correct format, number of images vs text etc. but now i think i have it down.

Basement wall 3D Section 1

Basement Wall 3D Section 2 

This chapter will be on basement walls, suspended slabs, beam and columns junction. The suspended slab will be in this case precast hollowcore concrete planks with a structural screed on top. If we take a look at the freehand detail we can decide what elements are involved and list them. Below section 1, 2 and 3

Even though it might look detailed and difficult to find a starting place, you can do a simple task which i call 'system family study', this is the process of drawing as many complete rectangles over the main frame of the building to distinguish how much of the detail you can do with just the basic system families such as walls, floors ceilings etc. Below is an example of how i would break it down.

As you can see you can break down the detail into many simple objects and just one or two complex objects, if you look at the area between the top of the basement wall and suspended slab, (the area of the concrete with a red outline) you are left with a profile shape which you can make a profile family for, import it into the model and assign it to a wall sweep that you will attach to the main concrete wall. You notice the difference between the profile in section 1 and section 2. Other tricks are unlocking a layer in the external wall family to extend down the brick.

List of components.


See the next blog for video tutorial. hopefully it will be posted over the next few days,



Sunday, 7 February 2010

7 Render Tips

Glass rendering techniques,


Tip 1. Generally you want a nice bit of reflection to show that the glass panel is glass, usually I bump up the reflection to around 30-35%.

Tip 2. Generally you want also to see where the glass is, when you select clear glass as a material it can be difficult to see it in renders without doing Photoshop work to the glass. I usually pick blue glass setting as a base.

Tip 3. Because revit is so perfect in terms of measurement and objects touching each other, the revit engine can sometime read a whole number of panels that's front face is aligned as one single panel and not show up the joint lines, you need to force gaps if you want nicer renderings, to understand this, the best plan is to copy your model and play around with the copy, I generally add curtain wall mullions that are black paint, 1/4" or 1/2" wide and render it, after see the results I can determine if it is too much or too little. Below, render glass reads as one panel as there is no dark mullions

The lighting is usually the most important factor of a rendering,

Tip 4. I usually bump up my lights to 10 times the realistic value, this is because the revit light settings aren't completely setup correctly.

Tip 5. Any lights that are very close to glass panels should be turned down individually to avoid hot spotting, using the dimmer in the render dialogue box is the simplest method.

Tip 6. For external renderings it can be especially difficult to read glass planes if there are no lights turned on inside the building, it will look like dark black panels as oppose to glass (Picture 2, see top left), turn on some lights and bump them up 100 times to be visible with the external daytime render settings. Once the lights inside become visible you should put the on a medium setting to avoid hot spotting, reflection in external views is also quite important. See picture 3 for an example

Picture 2

Picture 3

Tip 7. Once you've mastered the external daytime render with lights turned on inside the building you can turn it into a night renders with one very simple step in Photoshop. Take the daytime rendering jpeg and cut the sky background out in Photoshop and replace it with a night time sky. Leave the building as it was (day time rendering), now you render looks like a night time shot. See (picture 4) below, this was a daytime rendering with the sky and foreground swapped out.

Picture 4