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Forums >> Revit Building >> Technical Support >> Revit File at 20% and it HASNT Started Rendering Yet?!?!

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Fri, Apr 29, 2011 at 7:42:38 AM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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cobhc


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My render is 36" x 24", set for print at 150 dpi, saying its a 74.1MB uncompressed image. Its at about 21% now and the screen is still blank and it has not started rendering. Is this normal and if so how am I able to render at that exact scale (36 x 24) with at least 150dpi? The computer I am on is more than capable of rendering my image, I'm just wondering if revit cannot handle the image being that huge? Thank you!!!


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Fri, Apr 29, 2011 at 7:43:51 AM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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cobhc


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OH! and the setting is on HIGH


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Fri, Apr 29, 2011 at 8:44:03 AM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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You did not have any details on what you are rendering. Is it a interior or exterior scene? Do you have lots of elements or light fixtures in the scene? What details mode do you have it on?

Those are some of the factors that will increase the rendering time.

Also, for 24x36 for 150DPI, the rendering time will be significantly long. I have never tried to rendering an image that size (I try doing 150DPI for an exterior scene for 11x17 on High, it took me almost 2 hours) so I bet for 24x36, it will be much much longer.

 


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Fri, Apr 29, 2011 at 9:28:06 AM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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its an interior rendering in a warehouse with 148 lighting fixtures and i dont exactly know what you mean by details mode? It had been rendering for three hours and the image still hadn't even shown up to START rendering. i stopped it and started it again with all the same setting except the quality was medium. It went to 25% and hadn't even started rendering either. When I do draft and low it renders but its pixelated. I'm not quite sure whats the problem :/


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Fri, Apr 29, 2011 at 9:36:00 AM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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cobhc


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i began rendering with the screen mode on rather than printer and it started rendering fine, pixelated but its rendering. I cant imagine what the problem is



Edited on: Fri, Apr 29, 2011 at 9:38:54 AM

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Fri, Apr 29, 2011 at 9:38:23 AM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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Just like what I was saying. you have many light fixtures in the model and it usually take much longer to do interior rendering because revit is trying to calculate all the lights you have in the model. one of the things you can do is to group the light fixtures (only to the ones you use it for the rendering) and that should help cutting down the processing time.

What I mean by the detail mode is the detail level in your current camera view (is it coarse, medium or fine?)

Set it to fine and Revit is going to take more time based on your model of detail


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Fri, Apr 29, 2011 at 9:41:03 AM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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I see what youre saying. I have talked to a bunch of people in chat and they said the lights shouldnt make much of a difference. But I will try what youre saying. Also my detail is on medium. I'll let you know if the lights do anything


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Fri, Apr 29, 2011 at 10:11:23 AM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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Are dayight portals activated? If so, that will EXTEREMELY increase your rendering time.

Also, Keep in mind that when you render a 24x36 image at 150 dpi, it's going to come out 1.5 times bigger than 24x36, 3 times bigger for 300 dpi, 6 times bigger for 600 dpi, etc. So you could dial down the size a bit to achieve your 24x36 output size.

Large interior rendering scenes are always more complicated and take more time to render. If the lights are turned on it should make a big difference on rendering performance - this means that mental ray now needs to process light refraction and reflection from both the sun AND the artifical lights in relation to the elements in the scene. 

Good Luck!


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Fri, Apr 29, 2011 at 1:24:15 PM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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itsmyalterego


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The percent-o-meter is terribly unpredictible too.  You weren't really at 20-25%, the second pass of the render always takes about twice as long as the first, though it seems to think the beginning of the 2nd pass is 50%. 

 

usually the first chuncks start showing on screen at 10-15 percent.  Soundsl ike you've just got the give it time though.  Problem is that with so many light fixutres turned on, you're talking days, probably.  You might make a custom render setting, too, and manage your shadow quality, reflection bounces, etc, and remove features that don't apply to your scene. 


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Fri, Apr 29, 2011 at 1:30:40 PM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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thank you for all your help! I'm trying now to re-render and I'll update when I've applied all the tips! Smile


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Sat, Apr 30, 2011 at 5:42:54 AM | Revit File at 20% and it HASNT Started Rendering Yet?!?!

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Watch this too: http://therevitkid.blogspot.com/2011/04/revit-and-i7-processor-rendering.html?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+TheRevitKid+%28The+Revit+Kid.com!%29

 


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I Hope and I Wish to LEARN  more, and more, and more.... REVIT

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