So the idea I have is that the monsters in this game will have a genetic code...and have genes the have dominant, co-dominant, and ressesive genes.

The thing is... when I think it through I come to a problem... If everything is deifned by the genes and the genes can, with breeding change, then the different types of monsters are just skins and I'm not so sure that's a good idea.

So I have 4 general sections currently...

Appearance (pretty limited due to me not knowing how to warp meshes yet)

Elemental Values

Stat Values (Used to calculate a different set of stats)

Stat Growth Values

I was thinking that I could possibly have each monster have a different number of gene slots with the ability to gain or lose them when bred. And then also only allow certain "genes" in certain monsters so that you could never get an Ice elemental monster from a Fire one Or something like that.

So any ideas? Comments? thoughts on whether i'm wrong about this being a problem at all?

Have slots dedicated to specific genes. So elemental attributes will be one slot, physical strength is controlled by one slot, speed is controlled one slot, dexterity is controlled by one slot, accuracy one slot, physical attack possibilities get one slot... This way mutually exclusive genes have no risk of being on the same creature, with no special branching logic to prevent it - a single random number generation (using a PRNG with good bit randomness) for each slot can tell you which parent to inherit the gene from, whether it's the dominant or recessive attribute active, etc.

[if I do this] the different types of monsters are just skins and I'm not so sure that's a good idea.

Have slots dedicated to specific genes. So elemental attributes will be one slot, physical strength is controlled by one slot, speed is controlled one slot, dexterity is controlled by one slot, accuracy one slot, physical attack possibilities get one slot... This way mutually exclusive genes have no risk of being on the same creature, with no special branching logic to prevent it - a single random number generation (using a PRNG with good bit randomness) for each slot can tell you which parent to inherit the gene from, whether it's the dominant or recessive attribute active, etc.

[if I do this] the different types of monsters are just skins and I'm not so sure that's a good idea.

It's not. It would be possible to have a pitifully weak monster with huge muscles. Maybe possible to have a Charizard with ice elemental attributes. Would be too weird.
It's possible to generate monster appearances procedurally based on their genes. It'd be a lot of work, but it's definitely possible. And it could make the game more interesting, and allow you to reduce the actual content required. :)

I'm thinking something like...

There will be at least 1 slot for each gene, but then have the possibility that there could be more slots for each individual stat...

Then each gene will also have various modifiers to various other aspects... like the HPslotGene might have a small STR modifier.

And thene each slot has mother and father side.

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The as faras procedurally generating appearance. You know of any good tutorials on how to do it?