Revit Walkthrough bug?

[Richard McCarthy]

howdy everyone!
I was just wondering if anyone encounter this bug in walkthrough.... when I do walkthrough with Revit, it would RANDOMLY SCREW UP, when exporting to AVI. The anomlies are usually rapid shrinking (cropping) view in the animation that happens randomly. I have battle this problem for hours and it just seems so random (some walkthrough it is totally fine) while other walkthrough it just keep doing it when rendering to avi.
Does anyone know a solution to this problem? or is it just a bug waiting for the "shop" to be fixed?

[Chad Smith]

I did my very first walkthrough just yesterday, and while I'm not getting shrinking of the cropping, I do get other anomalies. I get shaded streaks across certain frames, and find the shadowing to be very inconsistent with it shifting around on the ground.

I'm thinking the walkthrough is more for quick and rough animation prototyping, rather than for a presentation quality animation.

[Richard McCarthy]

I did my very first walkthrough just yesterday, and while I'm not getting shrinking of the cropping, I do get other anomalies. I get shaded streaks across certain frames, and find the shadowing to be very inconsistent with it shifting around on the ground.

I'm thinking the walkthrough is more for quick and rough animation prototyping, rather than for a presentation quality animation.

Those streaking and shifting shadows sounds like OpenGL issues. I think you need to update your video card driver. If streaking still occurs, I think it is probably Z-fighting problem (gamer's video card lacks the accuracy, which makes z-fighting a constant issue on a lot of apps and also games - which can often be mitigated if programmers just implement a simple z-check routine.... BIG WINKS at AUTODESK PROGRAMMERS....)

[clog boy]

I don't get any of that at all, I have OpenGL disabled.
When I enable OpenGL, all shadows everywhere go crazy. I see partial 'shadow paths' (one big black haze from where shadows are traced). Perhaps it could be connected..?

I think it's about time Autodesk handed a list of what graphics adapters are fully supported, or use DirectX instead of OpenGL.

[Chad Smith]

Those streaking and shifting shadows sounds like OpenGL issues.
Just ran a test avi with OpenGL turned off with no success.

[gwnelson]

I have found that since there's no control over creating avi's, I have been using the jpg output, then compiling with a slide show into a movie. That way I can control the speed and even edit individual frames if necessary.

I only use avi output to run a draft version to check the camera.