Increase resolution of R rayshader image

Question

I'm trying to make an image using rayshader package. I've been happy that I've been able to create a png file using code like so:

library(ggplot2)
library(rayshader)

example_plot <- 
  ggplot(data.frame(x=c(1,2,3),y=c(4,5,6),z=c(5,4,3)),aes(x=x,y=y,color=z)) + geom_point()

plot_gg(example_plot, width = 2, height = 2, multicore = TRUE, scale = 125, 
        zoom = 0.5, phi = 60, theta=-10, windowsize = c(3200, 3200), offset_edges = TRUE)

Sys.sleep(2.0)

render_depth(focus = 0.5, focallength = 100, fstop = 8, clear = TRUE,filename="example.png")

Unfortunately, I can't figure out how to make the output image be a higher resolution. I've tried adjusting the windowsize which at low values seems to make a difference, but I've hit some sort of ceiling where the resolution of the output image won't go above 1372 x 893. What can I do to get an output image that is around 3200 x 3200 resolution?

Thanks!

Noni

Answer 1

Currently, rayshader is limited by rgl's lack of support for device sizes greater than the resolution of the screen. I tested it out on my 1440p monitor, and I was able to get render_snapshot() to create an image 2564x1421 (approximately the resolution of a 1440p monitor). If your monitor supports higher resolutions, you may be able to increase the snapshot size by temporarily increasing your desktop resolution. Otherwise, it's currently a limitation (see this github issue):

https://github.com/tylermorganwall/rayshader/issues/28

However, if you have the time/patience and don't mind the slightly different type of image it produces, render_highquality() uses a completely different rendering engine and can be set to any size output. Just set the width and height arguments to the desired size when calling that function.

Nectareous

Thanks! Changing my display in Windows from 200% scaling to 100% scaling was able to increase the output resolution to a value I needed. I tried render_highquality() but it seemed to go too slowly to be practical. – Noni

Answer 2

As an answer to Tyler's answer (i don't have enough reputation to comment)

This has been now been fixed

Arbitrary resolutions can now (as of commit 8e4353d ) be obtained via width/height arguments in render_snapshot() when software_render = TRUE.

issue on github

e.g. (4k resolution)

render_snapshot("file", software_render = TRUE, width = 3840, height = 2160)

David