Very strange rendering display

[jjocsak]

I was doing a 3D rendering of the back of my house plane and when it finished the radiosity, it looked ok.  Then it went into the Raytrace portion and finished.

But the strange thing is after the Raytrace it was not showing the back of the house it was showing the front. I was not saving to a file. This must have been a previous render and it was all washed out. If I go down to the display box and select the radiosity button it shows the rear view but when I select the Raytrace button it shows the front view.

I tried to modify viewpoint but that did not change anything.

I closed the program down then restarted and it did the same thing.
The program is storing this washed out Raytrace somewhere.
Maybe this has something to do with the washed out  rendering issues that we have been experiencing.

What in the world is going on?

What is causing this?

Jeff

Jeff

[jjocsak]

I located the BMP file that was showing up in the raytrace display and deleted it. Now when I go through the same process I get a blank screen for a raytrace. The radiosity display works normally.

Jeff

[jjocsak]

I also noticed that when you do a "Basic" rendering it creates a BMP file even though you have it set in options not to. This is the file that TFP was using for the Raytrace but not the Radiosity rendering.

This is getting very confusing.

Jeff

[Allan Chesney]

Jeff,

I always render to a file so I do not know whether it changes anything if you don't but once you do the Radiosity render the selector 'radio' buttons will show the last thing that was done with that option.  Modify Viewpoint will show the unrendered view, Radiosity shows that (the one you have just rendered, Rayrace will show the previous raytrace. After you do Step 2 (Raytrace) it should show the latest fully rendered view, Radiosity will show the latest and Modify will show the unrendered image.

When you are on Modify Viewpoint you should see the movement buttons become active and you can then use them to move around the model.  You then only have to do the Rayrace again as the whole model was done by Radiosity.  Only takes a few seconds. However if you are on Modify and have not raytraced again then the Radiosity and Raytrace buttons will still show the previous views.

Re the washed out problem.  I can get consistent results all the time but ONLY if I open and close the program between radiosity renders. The Reset does not work for me and the images get brighter an become totally white on the third render.  Restart the program and rendering is perfect again.  I feel sure there is an issue here as it seems others who have used Radiosity are getting similar effects.  At least restarting is a workaround  (for me anyway).

Allan

[jjocsak]

Maybe I 'm not understanding this correctly. But I'll give you the steps I going through.

1. Bring up a 3d view to render.
2. Bring up 3D RealView (advanced)
3. Click on the "calculate radiosity solution" - auto raytrace selected.
4. Options are set to 5 and not write to file.

It will go through the radiosity step showing the correct view
It will then go through the raytrace step also showing the correct view.
When it is complete the final view is incorrect it shows another view.
I though the final view is a combination of the radiosity and raytrace. Am I correct in this?

Then if I do a modify viewpoint and raytrace again it is not a rendering of this new viewpoint.

This always worked for me but not any more.

I just changed it to write to file and now it's working like it should.

Why should that make any difference?

I guess it must be raytracing from the created file.

Jeff

[Allan Chesney]

Jeff,

I dont see why it should behave like that but I will experiment with not writing to a file when I get a chance to see if it does the same for me.  In the meantime you may as well set it to write to a file if it works OK that way because it simply overwrites the previous one anyway (without warning!) unless you change the name - so you will not be creating unnecessary files and you make create a good one and want to keep it anyway.  Just go to the file, (named Project 1.bmp) and change the name to something else and you have it.  If the render is no good I just let the next one overwrite the dud one.

Allan

[jjocsak]

That's exactly what I have been doing.

Thanks Allan,

Jeff