Forums >> Revit Building >> Technical Support >> material vs over ride graphics in view

Bimman

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Joined: Wed, Dec 17, 2003
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we have a discussion going on the office over this question.  would it better in a ceiling plan to assign a gyp surface pattern to each ceiling through the over ride graphics or, make a duplicate gyp pattern and name it ceiling gyp and give it its surface pattern there.  i am for duplicating materials and making them match what you need rather than clicking each ceiling and assigning a pattern at each occurance on every floor, and room that neds it.  it seems to me that doing it by override graphics is not taking full advantage of what revit has to offer.  The othersides argument is that duplicating a material will cause the model to run slower since it has extra things to deal with.  its getting pretty heated over this.

 thanks for any input.

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alabaster2513

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TomDorner

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My 2 cents:

90 plus percent of the size of the model are the physical elements modeled.  Adding another material has such a small effect on the model size it probably can't even be measured.

I typically promote paying attention to the 'I' in BIM.  If you think about your situation, would it be nice to know how much drywall goes on ceiling vs. how much goes on walls?  I think it makes a difference in labor rates to hang the drywall.

I would have two materials:

GWB - Walls  [no surface pattern as I don't want surface patterns in elevation of GWB walls]

GWB - Ceilings [with sand or gyp. pattern so in an RCP I can tell GWB ceilings from areas of no ceiling]

Doing a graphic over-ride is way too much work and the materials give you flexibility of proper material take-offs and automatic graphics. 

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Bimman

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Joined: Wed, Dec 17, 2003
360 Posts

thanks for the support, i have won this one, but they still won't say it out loud that i had the best way of going about.  i going rub this in a little more.  we bust each others chops here unmercifully.

thanks again

Pete

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pmartini2012

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Old thread but I figured that I would comment nonetheless.  I would generally advise against making multiple materials of the same material because it can create graphical issues when the view is medium or fine.  If the materials are different, they will not meet nicely, i.e., there will be a line right where the two meet.  While not a terrible problem in plan views at 1/4" or smaller (you would need to look really closely to actually see the lines between materials), it is an issue in wall sections where the scales are 1/2" or larger.  All of the random lines between materials make the drawing look fuddled, and it will upset project architects.

We had this dilemma in a model that had a gypsum wall board for a large project of ours.  We had a gypsum wall board for ceilings, walls, and another (can't remember why there was a third) because they didn't want the gypsum board pattern to show on interior elevations but they did want them to show on ceilings.  When we started doing wall sections, particularly at the stairs where floors and ceilings and walls all meet, there were a bunch of random lines where all of the materials met and our project architect was very unhappy with how it looked.

If you run into issues like this, it is best to defer to other more automated graphical overrides rather than creating multiple materials of the same actual building material.  I would also strongly against manually overriding them, as your compadres were originally suggesting.  A filter (perhaps by creating another project parameter) is worth testing out in this case.

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