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sindn302 days ago

Hey, I'm having some issues! I get these weird lines when I'm using RFX_apply_screen(); in the draw gui, with

RFX_init(1, spr_DitherPattern,10);

var _tex = sprite_get_texture(RFXpalettes_spr,8);

RFX_set_palswap(_tex);

application_surface_draw_enable(false);

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LemonToast Games302 days ago

What happens when you change the first RFX_init(1, spr_DitherPattern,10); to use a value higher than 1 for the first argument?

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sindn302 days ago (1 edit)

Update: It seemed to fix itself! I have no idea how but when using a different texture for the terrain it's just gone. 

But could you just explain to me what each argument is exactly, and what number range they should be in, I have no idea if the arguments I provided are ridiculous or somewhat close to what you intended. 

Thanks for your help!

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LemonToast Games301 days ago

Make sure that separate texture page is set to on for any dither or lut texture you might use. 

Here's a breakdown of the RFX_Init function:

RFX_init(pixel width, dither texture, dither spread, SSAA(?), double wide pixels(?))

  • Pixel Width: How wide the pixels are on screen, 1 is unchanged from screen resolution, 2 two pixels wide, etc. Basically the bigger this number, the chunkier the graphics.
  • Dither texture should be pretty self explanatory, just use sprite_get_texture(dither_sprite,image_index)
  • Dither Spread, this controls how much dithering is visible, I used numbers between 32 and 256. The higher the number, the less dithering there is visible in the final result.
  • SSAA is an optional argument that enables or disables full screen antialiasing. It can result in a smoother looking image with a higher number. Be careful not to go too high or you will end up with a blurry looking final result.
  • Double Wide Pixels: This is the effect used in the thumbnail of this asset. It just makes each pixel twice as wide. It's a neat effect in my opinion, but some folks might not prefer it, therefore it is an optional argument.

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sindn301 days ago (1 edit)

Hi! Thanks for your help, but now a much more major issue has appeared. When creating any sprite, it doesn't even have to be drawn, and using rfx_apply_screen in draw gui, dithering is disabled and I get these weird checkerboard patterns

This happens with any sprite I create, and I think it might be the texture page, but clicking separate texture page simply replaces the checkerboard with the sprite. 

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LemonToast Games300 days ago

The only way to disable dithering is to use a dither texture that is just solid gray (50% luminance)

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LemonToast Games300 days ago

And you must always ensure that "separate texture page" is checked otherwise you will get weird visual errors.

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sindn300 days ago

Yes, but seperate texture page causes the sprite that has been seperated to just replace the checkerboard. 

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LemonToast Games299 days ago

yes, the checkerboard is the dither. If you just use a gray sprite there will be no checkerboard or dither anymore.

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