DPI selection problem

[Merlin]

I've started on a rather large project and have till now only "toyed around" with renderings in REVIT....I didn't see any problems until yesterday, when I tried to do a region raytrace.....I thought I'd like to increase the quality of the eventual output and decided to increase the DPI ( default was 200 DPI) to 300....It "spat the dummy" and was shown an error box that explained the size needed to be "...less than 10000" which indicated the changed width that was altered automatically when I tried to change the DPI to 300. When I put in that width and length values to 10000 or less, it automatically changes the DPI to only 54 and won't accept a higher DPI without changing the length & width to over 10000 (which it won't accept)!!!!!..What am I doing wrong?!?

cheers,
John Mc...
PS....I finally might be able to contribute a family item I've created soon!!!!

[beegee]

Hi John,

The thing to remember about Revit and DPI is that DPI does not stay tied to image size.
An image may be 100 DPI and produce a rendered image of 1500 pixels wide by 1000 pixels high. That is roughly equivalent to 4.3 Mb of RAM required.
Say you increase the DPI to 200. The image size is now 3000 pixels wide x 2000 pixels high and will now require approx 17 Mb of RAM to render.
You doubled the DPI , but more than quadrupled the memory required.

You may not need 300 DPI, or else you may be able to reduce the image size. Otherwise, you may be able to manipulate the image resolution post render in a paint program like Photoshop.

[Merlin]

Ah!.....Thanks, BG......I've also just realised I was trying to Raytrace from my 3D window....with the huge (we're talkin' H-U-G-E!) model, it would of course be that DPI and size for the little region raytrace I was trying to do.....I went to a view from a Walkthrough and "voila"! I could up the DPI past 300 if I so wished. Thanks again for responding.

By the way, that family I spoke of earlier is a window seat (my application is for one in a 500mm thick straw-bale wall) where the window frame is placed flush with the exterior line of the wall....do you think that this could be worth throwing out for anyone?

cheers,
John Mc

[beegee]

By the way, that family I spoke of earlier is a window seat (my application is for one in a 500mm thick straw-bale wall) where the window frame is placed flush with the exterior line of the wall....do you think that this could be worth throwing out for anyone?

cheers,
John Mc
Of course, our Exchange Manager, PeterJ, is English and, as such, is often bemoaning the lack of window seats in straw bale walls.

Seriously, we'd love to have all the families you ( and anyone who's interested ) care to submit.

[PeterJ]

I'm handy enough with the family editor until I start trying to make the baling twine parametric.

[Merlin]

Peter,
Have you really been involved in Straw Bale construction?....My first job as a drafter was a load-bearing Straw Bale house set in middle class developed suburbia. My lecturer asked if I wanted some work experience. I jumped at the opportunity, rocked up with timber standards, steel span tables, etc. and THEN found out it was to be Straw Bales!...Since then I've been involved in a couple more and enjoyed the experience.

[PeterJ]

No, but I do a little work with an engineering practice where one of the partners has done some straw bale housing in London
.
Whereabouts are you?

[Scott D Davis]

Our firm did a Straw Bale project for a sustainable design project here in Southern California.

[Merlin]

Pete,

Sorry I hadn't got back earlier.....I'm in Brisbane, Australia.....when I did those Straw Bale Houses, I was in a town west of here called Toowoomba

Scott,

Was the project inclusive of other buildings as well?...If so, what type were they?

John Mc