Hello,

I just bought the Jazz Jackrabbit Collection today and as I was playing it, I noticed that Jazz and some parts of the background (mainly the sun in stage 1) would flicker when Jazz is either running fast or jumping. So far I've made changes with the video settings for DOSBox and tried other builds of DOSBox (DOSBox ECE, DOSBox X, etc.) and nothing solved the problem. If anyone can help me figure this out how to fix this, if it's even possible, I would greatly appeciate it.

Bump!

Giving this a bump, going to experiment with the render method to see if there's any improvment

OpenJazz is not a source port, because the source code for Jazz 1 has never been released. OpenJazz reimplements the game through guesswork alone.

And that's a problem?

From what I've seen, it seems that sort of flickering is normal. Having played this game over a period of many years on different computers, different dosbox configs, etc., that flicker is always present. I could be wrong, but I've never been able to get rid of it.

Do we talk about Jazz1?

Jazz 1 runs at 60 fps. So you need to lock it at that speed somehow.
In order to achieve this I run Jazz 1 at an rather old SVN Daum Build. I use direct3d as output and vsync.

You can also try to set your Desktop Refresh Rate to the desired Framerate in order to lock it via vsync - I don't need to do that, but it might be worth trying that.

I would recommend to read this very usefull article (last post) it helped me a lot in different games: https://www.vogons.org/viewtopic.php?t=61322&p=685763