03756: gradius2, gradius2a, gradius2b, vulcan, vulcana, vulcanb: Graphics glitch on demo screen as the Heros screen is display

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
03756	Graphics	Minor	Always	Feb 28, 2010, 05:22	Nov 9, 2016, 08:57

Tester	gamestone	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Bugs That Aren't Bugs	OS
Status [?]	Resolved			Driver	konami/twin16.cpp
Version	0.136	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	03756: gradius2, gradius2a, gradius2b, vulcan, vulcana, vulcanb: Graphics glitch on demo screen as the Heros screen is display
Description	Title screen loops through three different stages, stage 1, stage 3 and stage 6, with the heros screens and history intro in between each stage. Stage 6 Maximum Speed - when Vic Viper crashes into the Big Core MkII laser the stars turn into squares as the Ranking Screen is displayed, this does not happen on my Japanese Gradius II GOFER no Yabou arcade PCB.
Steps To Reproduce	Watch the title loop demo until stage 6 is shown (third stage shown in the demo) .
Additional Information
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	gradius2, gradius2a, gradius2b, vulcan, vulcana, vulcanb

Attached Files	shot.png (21,861 bytes) Feb 28, 2010, 05:22

No.05796 Haze Senior Tester Feb 28, 2010, 14:11	sure this isn't just a gamma issue, ie, if you turn the brightness etc. right up on your original arcade monitor you might be able to see them too? it's not so common with Konami games, but with Capcom ones this kind of 'issue' is present in the majority of their titles simply because the developers assumed that a colour which was close to black would be seen as black on an original monitor.
No.05797 gamestone Tester Feb 28, 2010, 16:05	You are correct, after turning the brightness and contrast up all the way the squares are present. I've recorded a very short video show the arcade version has this glitch also. http://www.gamestone.co.uk/mame/gradius_ii_gofer_no_yabou.avi I guess as my PC monitor is much better than the old arcade monitor which makes it look much worse in MAME.
No.05798 Haze Senior Tester Feb 28, 2010, 18:28 edited on: Feb 28, 2010, 18:29	thanks, this should be attached to the report for future reference :-) and yes, colour reproduction is much better on modern PC monitors which is why artifacts like this are more obvious under emulation.
No.06672 robiza Developer Sep 2, 2010, 18:29	BTANB
No.13333 Fujix Administrator Nov 9, 2016, 08:57 edited on: Nov 21, 2016, 15:35	Moved the attached AVI file to YouTube.