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-   -   Strange problem with Imagine 4 FP (http://eab.abime.net/showthread.php?t=8953)

Hell 03 March 2003 21:48

Strange problem with Imagine 4 FP

Please excuse me, but I have a strange problem with Imagine 4 FPU version...

For any object, if I put a SPECULAR above 0, the program didn't render a light spot but a great monochrome circle.

Is this a FPU bug?

Toni Wilen 04 March 2003 10:43

More information, thanks..

Does switching JIT on/off have any effect, CPU type etc...
WinUAE version.

Hell 04 March 2003 12:17

I'm using the latest WinUAE in 68040 Mode. I tryed removing JIT effects, but the problem remains:(

Thank you.

Argh! 16 March 2003 11:04

1 Attachment(s)
I also have that problem! I've encountered it in every version of WinUAE I've used. I kept meaning to post about it before but always forgot. :o

Misc info:
* does not occur on my real Amiga 2000 (+ 030/882)
* occured in pre-JIT versions of WinUAE
* occurs in both Imagine 3 and 4
* occurs only in the FPU versions of Imagine
* occurs under all CPU and chipset settings
* occurs under both kickstart/Workbench 2.0 and 3.1

I've attached a couple rendered pics that illustrate the problem...

Hell 16 March 2003 11:07

YES! It's it!!!!

So, it's really a FPU emulation bug!:(

Toni Wilen 16 March 2003 11:54

Can someone write simple step-by-step instructions to reproduce this bug?

Hell 16 March 2003 12:01

Nothing special: just create a simple object, and in his ATTRIBUTES put a SPECULAR value different from zero.

Then make a render...and the risult is above...

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